validate: Avoid segfault in the error path

diff --git a/validate/gst/validate/media-descriptor-writer.c b/validate/gst/validate/media-descriptor-writer.c
index 27e5301..ead9594 100644 (file)
--- a/validate/gst/validate/media-descriptor-writer.c
+++ b/validate/gst/validate/media-descriptor-writer.c
@@ -519,7 +519,8 @@ gst_media_descriptor_writer_new_discover (GstValidateRunner * runner,
   if (info == NULL
       || gst_discoverer_info_get_result (info) != GST_DISCOVERER_OK) {
 
-    GST_ERROR ("Could not discover URI: %s (erro: %s", uri, (*err)->message);
+    GST_ERROR ("Could not discover URI: %s (error: %s(", uri,
+        err && *err ? (*err)->message : "Unkown");
 
     return NULL;
   }