Cleanup: quite some harmless but noisy warnings from gcc...

source/blender/collada/ArmatureImporter.cpp

@@ -53,8 +53,7 @@ static const char *bc_get_joint_name(T *node)
 static EditBone *get_edit_bone(bArmature * armature, char *name) {
 	EditBone  *eBone;
 
-	eBone = (EditBone *)armature->edbo->first;
+	for (eBone = (EditBone *)armature->edbo->first; eBone; eBone = eBone->next) {
-	for (eBone; eBone; eBone = eBone->next) {
 		if (!strcmp(name, eBone->name))
 			return eBone;
 	}
@@ -259,7 +258,7 @@ void ArmatureImporter::connect_bone_chains(bArmature *armature, Bone *parentbone
 	Bone *child = (Bone *)parentbone->childbase.first;
 	if (child && (import_settings->find_chains || child->next==NULL) )
 	{
-		for (child; child; child = child->next) {
+		for (; child; child = child->next) {
 			BoneExtended *be = extended_bones[child->name];
 			if (be != NULL) {
 				if (be->get_chain_length() <= clip) {

source/blender/editors/interface/interface_layout.c

@@ -904,7 +904,7 @@ void uiItemsFullEnumO(uiLayout *layout, const char *opname, const char *propname
 	if (prop && RNA_property_type(prop) == PROP_ENUM) {
 		EnumPropertyItem *item, *item_array = NULL;
 		bool free;
-		uiLayout *split;
+		uiLayout *split = NULL;
 		uiLayout *target;
 
 		if (radial) {

source/blender/editors/mask/mask_ops.c

@@ -516,7 +516,7 @@ static bool spline_under_mouse_get(const bContext *C,
 	MaskLayer *mask_layer;
 	int width, height;
 	float pixel_co[2];
-	float closest_dist_squared;
+	float closest_dist_squared = FLT_MAX;
 	MaskLayer *closest_layer = NULL;
 	MaskSpline *closest_spline = NULL;
 	bool undistort = false;
@@ -2209,7 +2209,7 @@ static int mask_duplicate_exec(bContext *C, wmOperator *UNUSED(op))
 				}
 				if (end >= start) {
 					int tot_point;
-					int tot_point_shape_start;
+					int tot_point_shape_start = 0;
 					MaskSpline *new_spline = BKE_mask_spline_add(mask_layer);
 					MaskSplinePoint *new_point;
 					int b;

source/blender/editors/object/object_relations.c

@@ -803,6 +803,7 @@ static void parent_set_vert_find(KDTree *tree, Object *child, int vert_par[3], b
 
 		tot = BLI_kdtree_find_nearest_n(tree, co_find, nearest, 3);
 		BLI_assert(tot == 3);
+		UNUSED_VARS(tot);
 
 		vert_par[0] = nearest[0].index;
 		vert_par[1] = nearest[1].index;

source/blender/editors/screen/area.c

@@ -895,7 +895,7 @@ static void region_azone_tria(ScrArea *sa, AZone *az, ARegion *ar)
 
 static void region_azone_initialize(ScrArea *sa, ARegion *ar, AZEdge edge, const bool is_fullscreen)
 {
-	AZone *az;
+	AZone *az = NULL;
 	const bool is_hidden = (ar->flag & (RGN_FLAG_HIDDEN | RGN_FLAG_TOO_SMALL)) == 0;
 	
 	if (is_hidden || !is_fullscreen) {
@@ -906,7 +906,7 @@ static void region_azone_initialize(ScrArea *sa, ARegion *ar, AZEdge edge, const
 		az->edge = edge;
 	}
 	
-	if (ar->flag & (RGN_FLAG_HIDDEN | RGN_FLAG_TOO_SMALL)) {
+	if (!is_hidden) {
 		if (!is_fullscreen) {
 			if (G.debug_value == 3)
 				region_azone_icon(sa, az, ar);

source/blender/editors/sculpt_paint/paint_vertex.c

@@ -2272,7 +2272,7 @@ static void wpaint_stroke_update_step(bContext *C, struct PaintStroke *stroke, P
 	float paintweight;
 	int *indexar;
 	float totw;
-	unsigned int index, totindex;
+	unsigned int index, totindex = 0;
 	float alpha;
 	float mval[2];
 	bool use_vert_sel;

source/blender/editors/space_sequencer/sequencer_select.c

@@ -350,7 +350,7 @@ static int sequencer_select_invoke(bContext *C, wmOperator *op, const wmEvent *e
 	}
 	else if (left_right != SEQ_SELECT_LR_NONE) {
 		/* use different logic for this */
-		float x;
+		float x = 0.0f;
 		ED_sequencer_deselect_all(scene);
 		
 		switch (left_right) {

source/blender/editors/transform/transform.c

@@ -5240,6 +5240,8 @@ static BMLoop *get_next_loop(BMVert *v, BMLoop *l,
 						float tvec[3];
 						float dist;
 
+						zero_v3(tvec);
+
 						if (bm_loop_calc_opposite_co(l_tmp, tdir, tvec)) {
 							dist = len_v3v3(l_tmp->v->co, tvec);
 						}

source/blender/editors/transform/transform_conversions.c

@@ -1117,7 +1117,7 @@ static void createTransArmatureVerts(TransInfo *t)
 	bool mirror = ((arm->flag & ARM_MIRROR_EDIT) != 0);
 	int total_mirrored = 0, i;
 	int oldtot;
-	BoneInitData *bid;
+	BoneInitData *bid = NULL;
 	
 	t->total = 0;
 	for (ebo = edbo->first; ebo; ebo = ebo->next) {

source/blender/modifiers/intern/MOD_laplaciansmooth.c

@@ -457,7 +457,7 @@ static void validate_solution(LaplacianSystem *sys, short flag, float lambda, fl
 {
 	int i;
 	float lam;
-	float vini, vend;
+	float vini = 0.0f, vend;
 
 	if (flag & MOD_LAPLACIANSMOOTH_PRESERVE_VOLUME) {
 		vini = compute_volume(sys->vertexCos, sys->mfaces, sys->numFaces);

source/blender/modifiers/intern/MOD_screw.c

@@ -174,7 +174,7 @@ static DerivedMesh *applyModifier(ModifierData *md, Object *ob,
 	MLoopUV **mloopuv_layers = BLI_array_alloca(mloopuv_layers, mloopuv_layers_tot);
 	float uv_u_scale;
 	float uv_v_minmax[2] = {FLT_MAX, -FLT_MAX};
-	float uv_v_range_inv;
+	float uv_v_range_inv = 0.0f;
 	float uv_axis_plane[4];
 
 	char axis_char = 'X';
@@ -194,7 +194,7 @@ static DerivedMesh *applyModifier(ModifierData *md, Object *ob,
 
 	unsigned int edge_offset;
 	
-	MPoly *mpoly_orig, *mpoly_new, *mp_new;
+	MPoly *mpoly_orig = NULL, *mpoly_new, *mp_new;
 	MLoop *mloop_orig, *mloop_new, *ml_new;
 	MEdge *medge_orig, *med_orig, *med_new, *med_new_firstloop, *medge_new;
 	MVert *mvert_new, *mvert_orig, *mv_orig, *mv_new, *mv_new_base;
@@ -875,7 +875,7 @@ static DerivedMesh *applyModifier(ModifierData *md, Object *ob,
 		const unsigned int step_last = step_tot - (close ? 1 : 2);
 		const unsigned int mpoly_index_orig = totpoly ? edge_poly_map[i] : UINT_MAX;
 		const bool has_mpoly_orig = (mpoly_index_orig != UINT_MAX);
-		float uv_v_offset_a, uv_v_offset_b;
+		float uv_v_offset_a = 0.0f, uv_v_offset_b = 0.0f;
 
 		const unsigned int mloop_index_orig[2] = {
 		    vert_loop_map ? vert_loop_map[medge_new[i].v1] : UINT_MAX,

source/blender/windowmanager/intern/wm_operators.c

@@ -4304,7 +4304,7 @@ static void radial_control_cancel(bContext *C, wmOperator *op)
 static int radial_control_modal(bContext *C, wmOperator *op, const wmEvent *event)
 {
 	RadialControl *rc = op->customdata;
-	float new_value, dist, zoom[2];
+	float new_value, dist = 0.0f, zoom[2];
 	float delta[2], ret = OPERATOR_RUNNING_MODAL;
 	bool snap;
 	float angle_precision = 0.0f;