Reset mbstate for other mbrtowc() calls returning -1

Continue the cleanup started in changesets c8c76a6a1e61 and
a3450fd50d11.  In those changesets, a bug was occurring due to the
mbstate not being reset when mbrtowc() returned -1.

This patch fixes other callers of mbrtowc() to reset mbstate when it
returns -1.

1 files changed, 2 insertions, 0 deletions

diff --git a/alias.c b/alias.c
index cb653fd1..0cb9ebe8 100644
--- a/alias.c
+++ b/alias.c
@@ -423,6 +423,8 @@ int mutt_check_alias_name (const char *s, char *dest, size_t destlen)
     {
       if (dry)
 	return -1;
+      if (l == (size_t)(-1))
+        memset (&mb, 0, sizeof (mbstate_t));
       *dest++ = '_';
       rv = -1;
     }