Thread safety fixes.

*** 1,7 ****
  /*
!  * Copyright 2013 Garrett D'Amore <garrett@damore.org>
   * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   * Copyright (c) 2002-2004 Tim J. Robbins.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
--- 1,7 ----
  /*
!  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
   * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   * Copyright (c) 2002-2004 Tim J. Robbins.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
*** 35,51 ****
  
  int
  mbtowc_l(wchar_t *_RESTRICT_KYWD pwc, const char *_RESTRICT_KYWD s, size_t n,
      locale_t loc)
  {
!         static const mbstate_t initial = { 0 };
!         static mbstate_t mbs;
          size_t rval;
  
          if (s == NULL) {
                  /* No support for state dependent encodings. */
-                 mbs = initial;
                  return (0);
          }
          rval = mbrtowc_l(pwc, s, n, &mbs, loc);
          if (rval == (size_t)-1 || rval == (size_t)-2)
                  return (-1);
--- 35,49 ----
  
  int
  mbtowc_l(wchar_t *_RESTRICT_KYWD pwc, const char *_RESTRICT_KYWD s, size_t n,
      locale_t loc)
  {
!         mbstate_t mbs = { 0 };
          size_t rval;
  
          if (s == NULL) {
                  /* No support for state dependent encodings. */
                  return (0);
          }
          rval = mbrtowc_l(pwc, s, n, &mbs, loc);
          if (rval == (size_t)-1 || rval == (size_t)-2)
                  return (-1);