[gtk+] Add include to fix the build

[Alexander Larsson <alexl src gnome org>]

commit 96bae6ad08a2154abd1ab3a0dead6fb137822995
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Nov 10 17:24:22 2011 +0100

    Add include to fix the build

 gtk/gtktreeview.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index 009faea..0160818 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -39,6 +39,7 @@
 #include "gtkcontainer.h"
 #include "gtkentry.h"
 #include "gtkframe.h"
+#include "gtkmain.h"
 #include "gtktreemodelsort.h"
 #include "gtktooltip.h"
 #include "gtkscrollable.h"