adapter: Check if meta transform_func is NULL before using it

https://bugzilla.gnome.org/show_bug.cgi?id=782050

diff --git a/libs/gst/base/gstadapter.c b/libs/gst/base/gstadapter.c
index 6c56c41f9a3792fe4f0ef8a5a454876bfadf1139..e3dff288fc5a008e67c71bc5eaa8995c8c2a28b8 100644 (file)
--- a/libs/gst/base/gstadapter.c
+++ b/libs/gst/base/gstadapter.c
@@ -929,7 +929,7 @@ foreach_metadata (GstBuffer * inbuf, GstMeta ** meta, gpointer user_data)
     GST_DEBUG ("copying metadata %s", g_type_name (info->api));
   }
 
-  if (do_copy) {
+  if (do_copy && info->transform_func) {
     GstMetaTransformCopy copy_data = { FALSE, 0, -1 };
     GST_DEBUG ("copy metadata %s", g_type_name (info->api));
     /* simply copy then */