window: Change meta_window_move_resize_internal to take a MetaRectangle

We construct one anyway, and most callers already pass in a rectangle
the long way around, so why not change the internal API?

src/core/window-private.h

@@ -741,10 +741,7 @@ void meta_window_update_resize (MetaWindow *window,
 void meta_window_move_resize_internal (MetaWindow          *window,
                                        MetaMoveResizeFlags  flags,
                                        int                  gravity,
-                                       int                  root_x_nw,
-                                       int                  root_y_nw,
-                                       int                  w,
-                                       int                  h);
+                                       MetaRectangle        client_rect);
 void meta_window_save_user_window_placement (MetaWindow *window);
 
 void meta_window_grab_op_began (MetaWindow *window, MetaGrabOp op);