Weird thread error which breaks the gtk-sharp build

I was giving my machine a bit of a workout to test some patches and I 
happened to pick the gnome2 ports build. All was going swimmingly until 
it fell flat on its face attempting to build gtk-sharp. As it turned 
out, an error (warning?) message from libthr had turned up in one of 
the source files that the build generated. I tweaked my sources as 
below to get around it but I'm not really sure of the right fix:

Index: thr_private.h
===================================================================
RCS file: /home/ncvs/src/lib/libthr/thread/thr_private.h,v
retrieving revision 1.77
diff -u -r1.77 thr_private.h
--- thr_private.h	20 Dec 2006 04:43:34 -0000	1.77
+++ thr_private.h	22 Jul 2007 17:54:21 -0000
_at__at_ -72,7 +72,7 _at__at_
 
 /* Output debug messages like this: */
 #define stdout_debug(args...)	_thread_printf(STDOUT_FILENO, ##args)
-#define stderr_debug(args...)	_thread_printf(STDOUT_FILENO, ##args)
+#define stderr_debug(args...)	_thread_printf(STDERR_FILENO, ##args)
 
 #ifdef _PTHREADS_INVARIANTS
 #define THR_ASSERT(cond, msg) do {	\