$NetBSD$

Fixes detection of gems rcairo.

--- clutter-cairo/extconf.rb.orig	2008-08-05 14:32:00.000000000 +0000
+++ clutter-cairo/extconf.rb
@@ -24,9 +24,9 @@ TOPDIR = File.expand_path(File.dirname(_
 PKGConfig.have_package('glib-2.0') or show_fail
 PKGConfig.have_package('clutter-0.8') or show_fail
 PKGConfig.have_package('clutter-cairo-0.8') or show_fail
-PKGConfig.have_package('cairo') or show_fail
 
-find_header("rb_cairo.h", *$:) or show_fail
+check_cairo or show_fail
+
 find_header("rbgobject.h", *$:) or show_fail
 
 add_depend_package("clutter", "clutter", TOPDIR)
