Fix function declaration of some modifiers

Those functions did not use evaluation context.

Also fixed lots of unused variables warnings caused by commented out code which
needs to be ported away from DerivedMesh and to evaluation context.

source/blender/blenkernel/intern/armature_update.c

@@ -125,6 +125,8 @@ static void splineik_init_tree_from_pchan(Scene *scene, Object *UNUSED(ob), bPos
 				return;
 			}
 		}
+#else
+		(void) scene;
 #endif
 	}
 

source/blender/makesrna/intern/rna_object.c

@@ -862,6 +862,9 @@ static void rna_Object_particle_update(Main *UNUSED(bmain), Scene *scene, Pointe
 #if 0
 	Object *ob = (Object *)ptr->id.data;
 	PE_current_changed(NULL, scene, ob);
+#else
+	(void) scene;
+	(void) ptr;
 #endif
 }
 

source/blender/modifiers/intern/MOD_remesh.c

@@ -204,7 +204,9 @@ static DerivedMesh *applyModifier(ModifierData *md,
 
 #else /* !WITH_MOD_REMESH */
 
-static DerivedMesh *applyModifier(ModifierData *UNUSED(md), Object *UNUSED(ob),
+static DerivedMesh *applyModifier(ModifierData *UNUSED(md),
+                                  struct EvaluationContext *UNUSED(eval_ctx),
+                                  Object *UNUSED(ob),
                                   DerivedMesh *derivedData,
                                   ModifierApplyFlag UNUSED(flag))
 {

source/blender/modifiers/intern/MOD_weightvgedit.c

@@ -164,7 +164,10 @@ static bool isDisabled(ModifierData *md, int UNUSED(useRenderParams))
 	return (wmd->defgrp_name[0] == '\0');
 }
 
-static DerivedMesh *applyModifier(ModifierData *md, Object *ob, DerivedMesh *derivedData,
+static DerivedMesh *applyModifier(ModifierData *md,
+                                  struct EvaluationContext *UNUSED(eval_ctx),
+                                  Object *ob,
+                                  DerivedMesh *derivedData,
                                   ModifierApplyFlag UNUSED(flag))
 {
 	WeightVGEditModifierData *wmd = (WeightVGEditModifierData *) md;

source/blender/python/bmesh/bmesh_py_types.c

@@ -1035,6 +1035,8 @@ static PyObject *bpy_bmesh_from_object(BPy_BMesh *self, PyObject *args, PyObject
 	dm->release(dm);
 
 	Py_RETURN_NONE;
+#else
+	UNUSED_VARS(self, args, kw);
 #endif
 	return NULL;
 }

source/blender/python/intern/gpu_offscreen.c

@@ -147,7 +147,7 @@ static PyObject *pygpu_offscreen_unbind(BPy_GPUOffScreen *self, PyObject *args,
 /**
  * Use with PyArg_ParseTuple's "O&" formatting.
  */
-static int pygpu_offscreen_check_matrix(PyObject *o, void *p)
+static int UNUSED_FUNCTION(pygpu_offscreen_check_matrix)(PyObject *o, void *p)
 {
 	MatrixObject **pymat_p = p;
 	MatrixObject  *pymat = (MatrixObject *)o;
@@ -246,6 +246,8 @@ static PyObject *pygpu_offscreen_draw_view3d(BPy_GPUOffScreen *self, PyObject *a
 	MEM_freeN(rv3d_mats);
 
 	Py_RETURN_NONE;
+#else
+	UNUSED_VARS(self, args, kwds);
 #endif
 	return NULL;
 }

source/blender/python/mathutils/mathutils_bvhtree.c

@@ -1098,6 +1098,8 @@ static DerivedMesh *bvh_get_derived_mesh(
 			}
 		}
 	}
+#else
+	UNUSED_VARS(funcname, scene, ob, use_deform, use_render, use_cage);
 #endif
 
 	return NULL;