errno fix

diff -r c045670f36e9 error.h
--- a/error.h	Thu Nov 01 14:46:11 2007 +0100
+++ b/error.h	Thu Nov 01 15:02:39 2007 +0100
@@ -1,7 +1,7 @@
 #ifndef ERROR_H
 #define ERROR_H
 
-extern int errno;
+#include <errno.h>
 
 extern int error_intr;
 extern int error_nomem;