Fix some Unicode characters not displaying correctly.

PR:		211499
Submitted by:	Oleg Gushchenkov
Obtained from:	65e4c57d3a
Sponsored by:	Absolight

sysutils/tmux/Makefile

@@ -3,6 +3,7 @@
 
 PORTNAME=	tmux
 PORTVERSION=	2.2
+PORTREVISION=	1
 CATEGORIES=	sysutils
 MASTER_SITES=	https://github.com/tmux/tmux/releases/download/${PORTVERSION}/
 DISTFILES=	${DISTNAME}${EXTRACT_SUFX}

sysutils/tmux/files/patch-utf8.c

@@ -0,0 +1,34 @@
+commit 65e4c57d3a554940ed5cada6dfeff403ae8d9572
+Author: Nicholas Marriott <nicholas.marriott@gmail.com>
+Date:   2016-04-29 12:47:15 +0100
+
+    Only assume width 1 when wcwidth() returns -1 on non-OpenBSD platforms.
+
+--- utf8.c.orig	2016-03-02 18:29:06 UTC
++++ utf8.c
+@@ -115,8 +115,24 @@ utf8_width(wchar_t wc)
+ 	int	width;
+ 
+ 	width = wcwidth(wc);
+-	if (width < 0 || width > 0xff)
++	if (width < 0 || width > 0xff) {
++		log_debug("Unicode %04x, wcwidth() %d", wc, width);
++
++#ifndef __OpenBSD__
++		/*
++		 * Many platforms (particularly and inevitably OS X) have no
++		 * width for relatively common characters (wcwidth() returns
++		 * -1); assume width 1 in this case. This will be wrong for
++		 * genuinely nonprintable characters, but they should be
++		 * rare. We may pass through stuff that ideally we would block,
++		 * but this is no worse than sending the same to the terminal
++		 * without tmux.
++		 */
++		if (width < 0)
++			return (1);
++#endif
+ 		return (-1);
++	}
+ 	return (width);
+ }
+