$OpenBSD: patch-backend_sm3600-scanusb_c,v 1.1 2016/05/18 20:02:27 sthen Exp $

errno.h header is required now that errno is a per-thread variable.
"undefined symbol 'errno'" at runtime with dlopen()'d modules.

--- backend/sm3600-scanusb.c.orig	Wed May 18 14:00:07 2016
+++ backend/sm3600-scanusb.c	Wed May 18 14:00:14 2016
@@ -51,6 +51,7 @@
 
 ====================================================================== */
 
+#include <errno.h>
 #include "sm3600-scantool.h"
 
 /* **********************************************************************
