Fix for bug #22763, Blender 2.52 Crashes with the default scene when in weight paint mode clicking the Levels option

* Add a `return 0' to ED_vgroup_give_parray to avoid falling through from mesh to lattice

source/blender/editors/object/object_vgroup.c

@@ -166,6 +166,8 @@ int ED_vgroup_give_parray(ID *id, MDeformVert ***dvert_arr, int *dvert_tot)
 
 					return 1;
 				}
+				else
+					return 0;
 			}
 			case ID_LT:
 			{