Return empty string if format is empty rather than attempting to

allocate zero bytes.

diff --git a/usr.bin/tmux/format.c b/usr.bin/tmux/format.c
index 8b47b36..9bf9a1c 100644 (file)
--- a/usr.bin/tmux/format.c
+++ b/usr.bin/tmux/format.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: format.c,v 1.66 2015/05/12 15:29:29 nicm Exp $ */
+/* $OpenBSD: format.c,v 1.67 2015/05/20 06:39:02 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -335,7 +335,7 @@ format_expand_time(struct format_tree *ft, const char *fmt, time_t t)
        size_t           tmplen;
        struct tm       *tm;
 
-       if (fmt == NULL)
+       if (fmt == NULL || *fmt == '\0')
                return (xstrdup(""));
 
        tm = localtime(&t);