window.c: Move misplaced break to where it belongs

The break statement wasn't copy and pasted along with the rest of the code
causing menu item before it ("Move to workspace below") to fall through to
the fullscreen case.

clients/window.c

@@ -1779,12 +1779,12 @@ frame_menu_func(struct window *window, int index, void *data)
 			workspace_manager_move_surface(display->workspace_manager,
 						       window->surface,
 						       display->workspace + 1);
+		break;
 	case 3: /* fullscreen */
 		/* we don't have a way to get out of fullscreen for now */
 		if (window->fullscreen_handler)
 			window->fullscreen_handler(window, window->user_data);
 		break;
-		break;
 	}
 }