[gthumb] Fixed a memory leak when setting the file property in the thumbnail cell renderer

[Paolo Bacchilega <paobac src gnome org>]

commit 5e4ae04b87aebfcbd1454fbc05d5dd064bb4e606
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Thu Nov 3 17:53:59 2011 +0100

    Fixed a memory leak when setting the file property in the thumbnail cell renderer

 gthumb/gth-cell-renderer-thumbnail.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gthumb/gth-cell-renderer-thumbnail.c b/gthumb/gth-cell-renderer-thumbnail.c
index ea7307d..ef6ffa3 100644
--- a/gthumb/gth-cell-renderer-thumbnail.c
+++ b/gthumb/gth-cell-renderer-thumbnail.c
@@ -137,6 +137,8 @@ gth_cell_renderer_thumbnail_set_property (GObject      *object,
 		self->priv->thumbnail = g_value_dup_object (value);
 		break;
 	case PROP_FILE:
+		if (self->priv->file != NULL)
+			g_object_unref (self->priv->file);
 		self->priv->file = g_value_dup_object (value);
 		break;
 	case PROP_CHECKED: