[gthumb/gthumb-2-14] Fixed a memory leak in GthCellRendererThumbnail

[Paolo Bacchilega <paobac src gnome org>]

commit e56ff6badcc3c480388b0f2ae5825f6e2aabbe05
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Thu Nov 3 17:41:34 2011 +0100

    Fixed a memory leak in GthCellRendererThumbnail

 gthumb/gth-cell-renderer-thumbnail.c |   15 +++++++++++----
 1 files changed, 11 insertions(+), 4 deletions(-)
---
diff --git a/gthumb/gth-cell-renderer-thumbnail.c b/gthumb/gth-cell-renderer-thumbnail.c
index 5b95f68..891ba50 100644
--- a/gthumb/gth-cell-renderer-thumbnail.c
+++ b/gthumb/gth-cell-renderer-thumbnail.c
@@ -135,9 +135,13 @@ gth_cell_renderer_thumbnail_set_property (GObject      *object,
 		self->priv->is_icon = g_value_get_boolean (value);
 		break;
 	case PROP_THUMBNAIL:
+		if (self->priv->thumbnail != NULL)
+			g_object_unref (self->priv->thumbnail);
 		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:
@@ -254,10 +258,6 @@ gth_cell_renderer_thumbnail_render (GtkCellRenderer      *cell,
 					      &thumb_rect.width,
 					      &thumb_rect.height);
 
-	pixbuf = self->priv->thumbnail;
-	if (pixbuf == NULL)
-		return;
-
 	gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
 
 	thumb_rect.x += cell_area->x + xpad;
@@ -273,6 +273,12 @@ gth_cell_renderer_thumbnail_render (GtkCellRenderer      *cell,
 
 	cr = gdk_cairo_create (window);
 
+	pixbuf = self->priv->thumbnail;
+	if (pixbuf == NULL)
+		return;
+
+	g_object_ref (pixbuf);
+
 	image_rect.width = gdk_pixbuf_get_width (pixbuf);
 	image_rect.height = gdk_pixbuf_get_height (pixbuf);
 	image_rect.x = thumb_rect.x + (thumb_rect.width - image_rect.width) * .5;
@@ -405,6 +411,7 @@ gth_cell_renderer_thumbnail_render (GtkCellRenderer      *cell,
 	cairo_fill (cr);
 
 	_g_object_unref (colorized);
+	g_object_unref (pixbuf);
 	cairo_destroy (cr);
 }