[rygel] tracker: Don't crash on unknown profile

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit f136af05e54604a67ccba013b53a0d3a4b106b40
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Wed Apr 13 14:33:33 2011 +0300

    tracker: Don't crash on unknown profile

 .../tracker/rygel-tracker-item-factory.vala        |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/src/plugins/tracker/rygel-tracker-item-factory.vala b/src/plugins/tracker/rygel-tracker-item-factory.vala
index 84ff639..ef08624 100644
--- a/src/plugins/tracker/rygel-tracker-item-factory.vala
+++ b/src/plugins/tracker/rygel-tracker-item-factory.vala
@@ -100,9 +100,13 @@ public abstract class Rygel.Tracker.ItemFactory {
         if (metadata[Metadata.DATE] != "")
             item.date = metadata[Metadata.DATE];
 
+        var profile = null as DLNAProfile;
         if (metadata[Metadata.DLNA_PROFILE] != "") {
             item.dlna_profile = metadata[Metadata.DLNA_PROFILE];
-            var profile = this.discoverer.get_profile (item.dlna_profile);
+            profile = this.discoverer.get_profile (item.dlna_profile);
+        }
+
+        if (profile != null) {
             item.mime_type = profile.mime;
         } else {
             item.mime_type = metadata[Metadata.MIME];