[rygel] media-export: Fix error introduced by previous commit

[Jens Georg <jensgeorg src gnome org>]

commit 5bf6cb7ce45337d9ab6fb6019cdd3204699cdbf5
Author: Jens Georg <mail jensge org>
Date:   Sun Feb 21 20:08:46 2016 +0100

    media-export: Fix error introduced by previous commit
    
    Signed-off-by: Jens Georg <mail jensge org>

 .../rygel-media-export-dvd-parser.vala             |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/plugins/media-export/rygel-media-export-dvd-parser.vala 
b/src/plugins/media-export/rygel-media-export-dvd-parser.vala
index ef97d94..44948c2 100644
--- a/src/plugins/media-export/rygel-media-export-dvd-parser.vala
+++ b/src/plugins/media-export/rygel-media-export-dvd-parser.vala
@@ -66,7 +66,7 @@ internal class Rygel.DVDParser : GLib.Object {
             throw new DVDParserError.NOT_AVAILABLE ("No DVD extractor found");
         }
 
-        var doc = this.get_information ();
+        var doc = yield this.get_information ();
         if (doc == null) {
             throw new DVDParserError.GENERAL ("Failed to read cache file");
         }