Author:  Jean-Luc Leger <reiga@dspnet.fr.eu.org>
Description: fix broken globbing expansion
Debian-Bug: #603545
--- a/tc.str.c
+++ b/tc.str.c
@@ -104,8 +104,9 @@ rt_mbtowc(Char *pwc, const char *s, size_t n)
 
     memset (&mb, 0, sizeof mb);
     ret = mbrtowc(&tmp, s, n, &mb);
-    if (ret > 0) {
+    if (ret >= 0)
 	*pwc = tmp;
+    if (ret > 0) {
 #ifdef UTF16_STRINGS
 	if (tmp >= 0xd800 && tmp <= 0xdbff) {
 	    /* UTF-16 surrogate pair.  Fetch second half and compute