[rhythmbox] rhythmdb: add missing glib-object.h include

[Jonathan Matthew <jmatthew src gnome org>]

commit b567cce324327f750bd6e059d87422c68d3f98c4
Author: Jonathan Matthew <jonathan d14n org>
Date:   Tue Jun 22 14:44:40 2010 +1000

    rhythmdb: add missing glib-object.h include

 rhythmdb/rb-refstring.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/rhythmdb/rb-refstring.h b/rhythmdb/rb-refstring.h
index 6bb39b7..2d3e6d0 100644
--- a/rhythmdb/rb-refstring.h
+++ b/rhythmdb/rb-refstring.h
@@ -26,6 +26,7 @@
  */
 
 #include <glib.h>
+#include <glib-object.h>
 
 #ifndef __RB_REFSTRING_H
 #define __RB_REFSTRING_H