[gtk+] Fix a memory leak with file chooser previews

[Matthias Clasen <matthiasc src gnome org>]

commit e7d4d77093c7bf09e9839b4c19c390625a11df5f
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Feb 17 18:34:28 2011 -0500

    Fix a memory leak with file chooser previews

 gtk/gtkfilechooserdefault.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkfilechooserdefault.c b/gtk/gtkfilechooserdefault.c
index 57d0514..e86175f 100644
--- a/gtk/gtkfilechooserdefault.c
+++ b/gtk/gtkfilechooserdefault.c
@@ -9611,6 +9611,13 @@ check_preview_change (GtkFileChooserDefault *impl)
 
       g_signal_emit_by_name (impl, "update-preview");
     }
+  else
+    {
+      if (new_file)
+        g_object_unref (new_file);
+
+      g_free (new_display_name);
+    }
 }
 
 static void