[mutter] wayland: Don't assert fail when dealing with popup windows

[Jasper St. Pierre <jstpierre src gnome org>]

commit c3950699bf200ff42a7336a7a238592bd818efbe
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Wed Aug 13 18:09:55 2014 -0400

    wayland: Don't assert fail when dealing with popup windows

 src/wayland/meta-wayland-surface.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/wayland/meta-wayland-surface.c b/src/wayland/meta-wayland-surface.c
index 4ec565d..9963353 100644
--- a/src/wayland/meta-wayland-surface.c
+++ b/src/wayland/meta-wayland-surface.c
@@ -1838,6 +1838,11 @@ meta_wayland_surface_configure_notify (MetaWaylandSurface *surface,
           sent_serial->value = serial;
         }
     }
+  else if (surface->xdg_popup.resource)
+    {
+      /* This can happen if the popup window loses or receives focus.
+       * Just ignore it. */
+    }
   else if (surface->wl_shell_surface.resource)
     wl_shell_surface_send_configure (surface->wl_shell_surface.resource,
                                      0, new_width, new_height);