# HG changeset patch
# User Rob Landley <rob@landley.net>
# Date 1201469168 21600
# Node ID 67a0839bda77b8b8a15468762b68ff031e043141
# Parent  e6273440c9c0f8e1a47672ff03198c97e99aefc4
Teach perror_exit() to take a NULL argument when we just want "command: error".

diff -r e6273440c9c0 -r 67a0839bda77 lib/lib.c
--- a/lib/lib.c	Sat Jan 26 23:18:08 2008 -0600
+++ b/lib/lib.c	Sun Jan 27 15:26:08 2008 -0600
@@ -20,9 +20,12 @@
 
 void verror_msg(char *msg, int err, va_list va)
 {
+	char *s = ": %s";
+
 	fprintf(stderr, "%s: ", toys.which->name);
-	vfprintf(stderr, msg, va);
-	if (err) fprintf(stderr, ": %s", strerror(err));
+	if (msg) vfprintf(stderr, msg, va);
+	else s+=2;
+	if (err) fprintf(stderr, s, strerror(err));
 	putc('\n', stderr);
 }