- added DirectMesh.getVert{Co,No} functions

- added mesh_get_derived_deform function (always returns a DerivedMesh
   corresponding to deformed (but not subdivided) mesh). used in places
   where original mesh is to be displayed but with deformed coordinates
   (vpaint for example).
 - added DirectMesh.getVert{Co,No} implementations for MeshDerivedMesh
 - updated vpaint to use mesh_get_derived_deform

source/blender/src/drawobject.c

@@ -1783,14 +1783,10 @@ static void draw_mesh_fancy(Object *ob, DerivedMesh *baseDM, DerivedMesh *realDM
 	int hasHaloMat = (ma && (ma->mode&MA_HALO));
 	int draw_wire = ob->dtx&OB_DRAWWIRE;
 	DispList *dl;
-	float *obExtVerts;
 	DerivedMesh *dm = realDM?realDM:baseDM;
 
 	glFrontFace((ob->transflag&OB_NEG_SCALE)?GL_CW:GL_CCW);
 
-	dl = find_displist(&ob->disp, DL_VERTS);
-	obExtVerts = dl?dl->verts:NULL;
-
 		// Unwanted combination.
 	if (G.f&G_FACESELECT) draw_wire = 0;