wayland/surface: Fix crash when unexporting

This is the exact same problem of 655c9dd526.

diff --git a/gdk/wayland/gdksurface-wayland.c b/gdk/wayland/gdksurface-wayland.c
index aed4489c7cf2c8489ad96b1f9debee647dd08ee4..80e12e29cec85deb04dd72fb2130fe4f0ef97f44 100644 (file)
--- a/gdk/wayland/gdksurface-wayland.c
+++ b/gdk/wayland/gdksurface-wayland.c
@@ -4184,8 +4184,11 @@ gdk_wayland_surface_unexport_handle (GdkSurface *surface)
 
   g_clear_pointer (&impl->display_server.xdg_exported,
                    zxdg_exported_v1_destroy);
-  g_clear_pointer (&impl->exported.user_data,
-                   impl->exported.destroy_func);
+  if (impl->exported.destroy_func)
+    {
+      g_clear_pointer (&impl->exported.user_data,
+                       impl->exported.destroy_func);
+    }
 }
 
 static void