Coverity CID 60620: Explicit null dereferenced

CID 60620 (#1 of 1): Explicit null dereferenced (FORWARD_NULL)
17. var_deref_model: Passing null pointer file_list to
thunar_application_unlink_files, which dereferences it.

thunar/thunar-dbus-service.c

@@ -1288,7 +1288,7 @@ thunar_dbus_service_unlink_files (ThunarDBusService  *dbus_service,
         }
 
       /* check if we succeeded */
-      if (err == NULL)
+      if (err == NULL && file_list != NULL)
         {
           /* tell the application to move the specified files to the trash */
           application = thunar_application_get ();