shelf content change handle - only show again if hidden bc its a shelf

src/bin/e_int_gadcon_config.c

@@ -599,7 +599,8 @@ _cb_del(void *data, void *data2 EINA_UNUSED)
                e_shelf_hide(cfdata->gc->shelf);
              e_gadcon_unpopulate(cfdata->gc);
              e_gadcon_populate(cfdata->gc);
-             e_shelf_show(cfdata->gc->shelf);
+             if (cfdata->gc->shelf)
+               e_shelf_show(cfdata->gc->shelf);
           }
         e_config_save_queue();
      }