Bugfix #5159

SHIFT+K clear vertexpaint didn't work for faceselect+paint mode. Calls
to depsgraph were confused, now nicely centralized.

source/blender/src/buttons_editing.c

@@ -3994,7 +3994,6 @@ void do_fpaintbuts(unsigned short event)
 			clear_vpaint_selectedfaces();
 		else
 			clear_vpaint();
-		DAG_object_flush_update(G.scene, ob, OB_RECALC_DATA);
 		break;
 	case B_REDR_3D_IMA:
 		allqueue(REDRAWVIEW3D, 0);

source/blender/src/vpaint.c

@@ -352,7 +352,9 @@ void clear_vpaint_selectedfaces()
 			tf[i].col[3] = paintcol;
 		}
 	}
+	
 	BIF_undo_push("Clear vertex colors");
+	DAG_object_flush_update(G.scene, ob, OB_RECALC_DATA);
 	allqueue(REDRAWVIEW3D, 0);
 }