[brasero] Silence a warning

[Philippe Rouquier <philippr src gnome org>]

commit 7546734eebe08bcec3e18033408dabba0c46410a
Author: Philippe Rouquier <bonfire-app wanadoo fr>
Date:   Mon Aug 31 14:09:51 2009 +0200

    Silence a warning

 libbrasero-media/brasero-medium-selection.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/libbrasero-media/brasero-medium-selection.c b/libbrasero-media/brasero-medium-selection.c
index cd352da..a26d66c 100644
--- a/libbrasero-media/brasero-medium-selection.c
+++ b/libbrasero-media/brasero-medium-selection.c
@@ -408,7 +408,8 @@ brasero_medium_selection_set_active (BraseroMediumSelection *selector,
 			break;
 		}
 
-		g_object_unref (iter_medium);
+		if (iter_medium)
+			g_object_unref (iter_medium);
 	} while (gtk_tree_model_iter_next (model, &iter));
 
 	return result;