[PATCH] Fix build with non-wchar toolchains

[Bernd Kuhls]

Commit a7f5650e6549e1b5c4e2e1fa30eee19de6bcbe7a added two functions to
mbutil.c but forgot to add defines for HANDLE_MULTIBYTE causing build
errors with toolchains without wchar support:

../mbutil.c: In function ‘_rl_mb_strcaseeqn’:
../mbutil.c:594:3: error: unknown type name ‘mbstate_t’

Signed-off-by: Bernd Kuhls <be...@kuhls.net>
---
 mbutil.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mbutil.c b/mbutil.c
index 5243fd7..c15f3aa 100644
--- a/mbutil.c
+++ b/mbutil.c
@@ -584,6 +584,7 @@ _rl_find_prev_mbchar (const char *string, int seed, int 
flags)
 #endif
 }
 
+#if defined (HANDLE_MULTIBYTE)
 /* Compare the first N characters of S1 and S2 without regard to case. If
    FLAGS&1, apply the mapping specified by completion-map-case and make
    `-' and `_' equivalent. Returns 1 if the strings are equal. */
@@ -658,3 +659,4 @@ _rl_mb_charcasecmp (const char *s1, mbstate_t *ps1, const 
char *s2, mbstate_t *p
     return 1;
   return (wc1 == wc2);
 }
+#endif /* HANDLE_MULTIBYTE */
-- 
2.39.5