nsf_init -> gstnsf_init to prevent symbol conflict with security/nss

$OpenBSD: patch-gst_nsf_gstnsf_c,v 1.2 2010/06/02 16:56:46 ajacoutot Exp $
--- gst/nsf/gstnsf.c.orig	Fri May 14 02:48:27 2010
+++ gst/nsf/gstnsf.c	Wed Jun  2 14:30:54 2010
@@ -171,7 +171,7 @@ gst_nsfdec_class_init (GstNsfDec * klass)
   GST_DEBUG_CATEGORY_INIT (nsfdec_debug, "nsfdec", 0,
       "NES sound file (nsf) decoder");
 
-  nsf_init ();
+  gstnsf_init ();
 }
 
 static void
