find(1) shows bogus error messages

[Piotr Durlej]

To reproduce:

$ /usr/bin/find /bin /nonexistent -ls > /dev/null
find: /nonexistent: Undefined error: 0
$ /usr/bin/find /bin /nonexistent > /dev/null
find: /nonexistent: Operation not supported by device
$ uname -mrsv
OpenBSD 5.6 GENERIC#2 i386
$

Here is a patch:

--- usr.bin/find/find.c.old     Tue Jan  3 00:19:45 2012
+++ usr.bin/find/find.c Sun Nov 30 23:41:43 2014
@@ -180,7 +180,7 @@ find_execute(PLAN *plan,    /* search plan */
                case FTS_ERR:
                case FTS_NS:
                        (void)fflush(stdout);
-                       warn("%s", entry->fts_path);
+                       warnc(entry->fts_errno, "%s", entry->fts_path);
                        rval = 1;
                        continue;
                }