[gitg] Fix leak of revision ref in DND

[Jesse van den Kieboom <jessevdk src gnome org>]

commit dc6aae149ce4f5898fadbc844490731519f614ff
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Sat Oct 23 14:51:11 2010 +0200

    Fix leak of revision ref in DND

 gitg/gitg-dnd.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/gitg/gitg-dnd.c b/gitg/gitg-dnd.c
index 777db38..c10b070 100644
--- a/gitg/gitg-dnd.c
+++ b/gitg/gitg-dnd.c
@@ -462,6 +462,11 @@ begin_drag (GtkWidget   *widget,
 
 			gtk_tree_path_free (path);
 		}
+
+		if (revision)
+		{
+			gitg_revision_unref (revision);
+		}
 	}
 }