[rygel] media-export: avoid crash if unknown file is found

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 99f1b150afec96ac9ff213c085a8bc50edd67e28
Author: Jens Georg <mail jensge org>
Date:   Tue Aug 11 17:54:29 2009 +0200

    media-export: avoid crash if unknown file is found
    
    Reported on IRC by "fatal" (Andreas Henriksson)

 .../media-export/rygel-media-export-harvester.vala |   18 ++++++++++--------
 .../media-export/rygel-media-export-item.vala      |    3 ++-
 2 files changed, 12 insertions(+), 9 deletions(-)
---
diff --git a/src/plugins/media-export/rygel-media-export-harvester.vala b/src/plugins/media-export/rygel-media-export-harvester.vala
index f656ca3..9a85340 100644
--- a/src/plugins/media-export/rygel-media-export-harvester.vala
+++ b/src/plugins/media-export/rygel-media-export-harvester.vala
@@ -297,15 +297,17 @@ public class Rygel.MediaExportHarvester : GLib.Object {
                                                this.containers.peek_head (),
                                                file,
                                                tag_list);
-            item.parent_ref = this.containers.peek_head ();
-            try {
-                if (entry.update) {
-                    this.media_db.update_object (item);
-                } else {
-                    this.media_db.save_object (item);
+            if (item != null) {
+                item.parent_ref = this.containers.peek_head ();
+                try {
+                    if (entry.update) {
+                        this.media_db.update_object (item);
+                    } else {
+                        this.media_db.save_object (item);
+                    }
+                } catch (Error error) {
+                    // Ignore it for now
                 }
-            } catch (Error error) {
-                // Ignore it for now
             }
 
             this.files.pop_head ();
diff --git a/src/plugins/media-export/rygel-media-export-item.vala b/src/plugins/media-export/rygel-media-export-item.vala
index 9b6f594..4a5c51e 100644
--- a/src/plugins/media-export/rygel-media-export-item.vala
+++ b/src/plugins/media-export/rygel-media-export-item.vala
@@ -137,8 +137,9 @@ public class Rygel.MediaExportItem : Rygel.MediaItem {
                         tag_list.get_int (MetadataExtractor.TAG_RYGEL_HEIGHT, out height)) {
                         class_guessed = MediaItem.IMAGE_CLASS;
                     } else {
-                        warning("There's no codec inside and no image for file" +
+                        warning("There's no codec inside and file is no image: " +
                                 "%s", file.get_uri ());
+                        return null;
                     }
                 } else {
                     class_guessed = MediaItem.AUDIO_CLASS;