5158 sed dumps core in new multibyte code
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>

*** 37,46 ****
--- 37,51 ----
  
  size_t
  mbsrtowcs_l(wchar_t *_RESTRICT_KYWD dst, const char **_RESTRICT_KYWD src,
      size_t len, mbstate_t *_RESTRICT_KYWD ps, locale_t loc)
  {
+         static mbstate_t mbs;
+ 
+         if (ps == NULL)
+                 ps = &mbs;
+ 
          return (loc->ctype->lc_mbsnrtowcs(dst, src, ULONG_MAX, len, ps));
  }
  
  size_t
  mbsrtowcs(wchar_t *_RESTRICT_KYWD dst, const char **_RESTRICT_KYWD src,