Sync rev 1.49.

Prevent infinite for loop since i went from ssize_t to size_t.  Patch from
eagleoflqj via OpenSSH github PR#178, ok djm@, feedback & ok millert@

openbsd-compat/glob.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: glob.c,v 1.48 2019/02/04 16:45:40 millert Exp $ */
+/*	$OpenBSD: glob.c,v 1.49 2020/04/21 08:25:22 dtucker Exp $ */
 /*
  * Copyright (c) 1989, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -833,7 +833,7 @@ globextend(const Char *path, glob_t *pglob, struct glob_lim *limitp,
 	if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
 		/* first time around -- clear initial gl_offs items */
 		pathv += pglob->gl_offs;
-		for (i = pglob->gl_offs; --i >= 0; )
+		for (i = pglob->gl_offs; i > 0; i--)
 			*--pathv = NULL;
 	}
 	pglob->gl_pathv = pathv;
@@ -845,7 +845,7 @@ globextend(const Char *path, glob_t *pglob, struct glob_lim *limitp,
 		if (pglob->gl_statv == NULL && pglob->gl_offs > 0) {
 			/* first time around -- clear initial gl_offs items */
 			statv += pglob->gl_offs;
-			for (i = pglob->gl_offs; --i >= 0; )
+			for (i = pglob->gl_offs; i > 0; i--)
 				*--statv = NULL;
 		}
 		pglob->gl_statv = statv;