$OpenBSD: patch-extern_wcwidth_wcwidth_h,v 1.1 2020/11/29 19:57:01 sthen Exp $

uchar.h doesn't exist in OpenBSD

--- extern/wcwidth/wcwidth.h.orig	Tue Sep 22 19:36:29 2020
+++ extern/wcwidth/wcwidth.h	Sun Nov 22 13:12:51 2020
@@ -21,7 +21,7 @@
 #define __WCWIDTH_H__
 
 #ifndef __cplusplus
-#  if defined(__APPLE__) || defined(__NetBSD__)
+#  if defined(__APPLE__) || defined(__NetBSD__) || defined(__OpenBSD__)
 /* The <uchar.h> standard header is missing on macOS. */
 #include <stddef.h>
 typedef unsigned int char32_t;
