Fix building w/o Python

Also minor cleanup.

source/blender/blenkernel/BKE_DerivedMesh.h

@@ -166,7 +166,7 @@ typedef enum DMDirtyFlag {
 	DM_DIRTY_TESS_CDLAYERS = 1 << 0,
 	/* One of the MCOL layers have been updated, force updating of GPUDrawObject's colors buffer.
 	 * This is necessary with modern, VBO draw code, as e.g. in vpaint mode me->mcol may be updated
-	 * without actually rebuilding dm (hence by defautl keeping same GPUDrawObject, and same colors
+	 * without actually rebuilding dm (hence by default keeping same GPUDrawObject, and same colors
 	 * buffer, which prevents update during a stroke!). */
 	DM_DIRTY_MCOL_UPDATE_DRAW = 1 << 1,
 

source/blender/blenkernel/intern/mesh.c

@@ -2497,7 +2497,7 @@ Mesh *BKE_mesh_new_from_object(
 				ListBase disp = {NULL, NULL};
 				/* TODO(sergey): This is gonna to work for until EvaluationContext
 				 *               only contains for_render flag. As soon as CoW is
-				 *               implemented, this is to be rethinked.
+				 *               implemented, this is to be rethought.
 				 */
 				EvaluationContext eval_ctx;
 				DEG_evaluation_context_init(&eval_ctx, DAG_EVAL_RENDER);

source/blender/editors/util/numinput.c

@@ -478,9 +478,9 @@ bool handleNumInput(bContext *C, NumInput *n, const wmEvent *event)
 	/* At this point, our value has changed, try to interpret it with python (if str is not empty!). */
 	if (n->str[0]) {
 		const float val_prev = n->val[idx];
+		double val;
 #ifdef WITH_PYTHON
 		Scene *sce = CTX_data_scene(C);
-		double val;
 		char str_unit_convert[NUM_STR_REP_LEN * 6];  /* Should be more than enough! */
 		const char *default_unit = NULL;
 
@@ -506,8 +506,9 @@ bool handleNumInput(bContext *C, NumInput *n, const wmEvent *event)
 			n->val_flag[idx] |= NUM_INVALID;
 		}
 #else  /* Very unlikely, but does not harm... */
-		n->val[idx] = (float)atof(n->str);
-		(void)C;
+		val = atof(n->str);
+		n->val[idx] = (float)val;
+		UNUSED_VARS(C);
 #endif  /* WITH_PYTHON */
 
 		if (n->val_flag[idx] & NUM_NEGATE) {

source/blender/render/intern/source/external_engine.c

@@ -1,11 +1,10 @@
 /*
-
  * ***** BEGIN GPL LICENSE BLOCK *****
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version. 
+ * of the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of

source/blender/windowmanager/intern/wm_files.c

@@ -482,6 +482,8 @@ static void wm_file_read_post(bContext *C, const bool is_startup_file, const boo
 		BPY_python_reset(C);
 		addons_loaded = true;
 	}
+#else
+	UNUSED_VARS(use_userdef);
 #endif  /* WITH_PYTHON */
 
 	WM_operatortype_last_properties_clear_all();