shell: Do not set XFixes input region on wayland compositors

This is just needed on the X11 compositor, wayland compositors are known
for handling their own input.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/378

js/ui/layout.js

@@ -1072,8 +1072,7 @@ var LayoutManager = GObject.registerClass({
             }
         }
 
-        if (!Meta.is_wayland_compositor())
-            global.set_stage_input_region(rects);
+        global.set_stage_input_region(rects);
         this._isPopupWindowVisible = isPopupMenuVisible;
 
         let workspaceManager = global.workspace_manager;

src/shell-global.c

@@ -642,6 +642,9 @@ shell_global_set_stage_input_region (ShellGlobal *global,
 
   g_return_if_fail (SHELL_IS_GLOBAL (global));
 
+  if (meta_is_wayland_compositor ())
+    return;
+
   nrects = g_slist_length (rectangles);
   rects = g_new (XRectangle, nrects);
   for (r = rectangles, i = 0; r; r = r->next, i++)