[vala] glib-2.0: Fix g_find_program_in_path binding

[Jürg Billeter <juergbi src gnome org>]

commit e3ead205f7f8f15187b9f5a0e2d358cb532563fe
Author: Michael 'Mickey' Lauer <mickey vanille-media de>
Date:   Fri Apr 10 10:32:53 2009 +0200

    glib-2.0: Fix g_find_program_in_path binding
---
 vapi/glib-2.0.vapi |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/vapi/glib-2.0.vapi b/vapi/glib-2.0.vapi
index 3eaa980..ca866ab 100644
--- a/vapi/glib-2.0.vapi
+++ b/vapi/glib-2.0.vapi
@@ -1978,7 +1978,7 @@ namespace GLib {
 		[CCode (cname = "g_get_current_dir")]
 		public static string get_current_dir ();
 		[CCode (cname = "g_find_program_in_path")]
-		public static string find_program_in_path (string program);
+		public static string? find_program_in_path (string program);
 		[CCode (cname = "g_atexit")]
 		public static void atexit (VoidFunc func);
 		[CCode (cname = "g_chdir")]