Part of bug #182726. Use gtk_socket_add_id() instead of gtk_socket_steal().

widget/src/gtkxtbin/gtk2xtbin.c

@@ -276,7 +276,7 @@ gtk_xtbin_realize (GtkWidget *widget)
   gdk_flush();
 
   /* now that we have created the xt client, add it to the socket. */
-  gtk_socket_steal(GTK_SOCKET(widget), xtbin->xtwindow);
+  gtk_socket_add_id(GTK_SOCKET(widget), xtbin->xtwindow);
 }