[grilo] core: fix potential segfault in metadata_full_resolution_done_cb()

[Iago Toral Quiroga <itoral src gnome org>]

commit 9b10a74236f3b0343686efd4934e37b8720eb039
Author: Guillaume Emont <gemont igalia com>
Date:   Thu Feb 10 12:29:00 2011 +0100

    core: fix potential segfault in metadata_full_resolution_done_cb()
    
    When introducing the cancel notification patch, it was assumed that the source
    passed to metadata_full_resolution_done_cb() is the original media source that
    triggered the full resolution. This is generally wrong, and can cause a
    segfault. The original source is available in cb_info->source.
    
    Signed-off-by: Iago Toral Quiroga <itoral igalia com>

 src/grl-media-source.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/grl-media-source.c b/src/grl-media-source.c
index f3ea5e0..7e6a057 100644
--- a/src/grl-media-source.c
+++ b/src/grl-media-source.c
@@ -1273,7 +1273,7 @@ metadata_full_resolution_done_cb (GrlMetadataSource *source,
   if (cb_info->pending_callbacks == 0) {
     GError *_error = (GError *)error;
     gboolean should_free_error = FALSE;
-    if (operation_is_cancelled (GRL_MEDIA_SOURCE (source),
+    if (operation_is_cancelled (cb_info->source,
                                 cb_info->ctl_info->metadata_id)) {
       /* if the plugin already set an error, we don't care because we're
        * cancelled */