[perl-Glib-Object-Introspection] Allow undef for the library search path

[Torsten Schönfeld <tsch src gnome org>]

commit 6586c57c19e3ec88c1d3ebbfafd99ef38fbbfc23
Author: Torsten Schönfeld <kaffeetisch gmx de>
Date:   Mon May 23 23:23:50 2011 +0200

    Allow undef for the library search path

 GObjectIntrospection.xs |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/GObjectIntrospection.xs b/GObjectIntrospection.xs
index b72b8f0..ecf57fe 100644
--- a/GObjectIntrospection.xs
+++ b/GObjectIntrospection.xs
@@ -1925,7 +1925,7 @@ void
 _load_library (class, namespace, version, search_path=NULL)
 	const gchar *namespace
 	const gchar *version
-	const gchar *search_path
+	const gchar_ornull *search_path
     PREINIT:
 	GIRepository *repository;
 	GError *error = NULL;