grep: use mbclen cache in one more place

* src/grep.c (fgrep_to_grep_pattern): Use mb_clen here, too.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/grep.c b/src/grep.c
index 72a811e3..e4379bc7 100644
--- a/src/grep.c
+++ b/src/grep.c
@@ -1912,8 +1912,7 @@ fgrep_to_grep_pattern (size_t len, char const *keys,
 
   for (; len; keys += n, len -= n)
     {
-      wchar_t wc;
-      n = mbrtowc (&wc, keys, len, &mb_state);
+      n = mb_clen (keys, len, &mb_state);
       switch (n)
         {
         case (size_t) -2: