5604 widec.h should expose ws* under __EXTENSIONS__

*** 74,84 ****
  extern size_t   wsspn(const wchar_t *, const wchar_t *);
  extern size_t   wscspn(const wchar_t *, const wchar_t *);
  extern int      wscoll(const wchar_t *, const wchar_t *);
  extern size_t   wsxfrm(wchar_t *, const wchar_t *, size_t);
  
! #if !defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)
  
  extern wchar_t  *wsdup(const wchar_t *);
  extern int      wscol(const wchar_t *);
  extern double   wstod(const wchar_t *, wchar_t **);
  extern long     wstol(const wchar_t *, wchar_t **, int);
--- 74,84 ----
  extern size_t   wsspn(const wchar_t *, const wchar_t *);
  extern size_t   wscspn(const wchar_t *, const wchar_t *);
  extern int      wscoll(const wchar_t *, const wchar_t *);
  extern size_t   wsxfrm(wchar_t *, const wchar_t *, size_t);
  
! #if !defined(_STRICT_SYMBOLS)
  
  extern wchar_t  *wsdup(const wchar_t *);
  extern int      wscol(const wchar_t *);
  extern double   wstod(const wchar_t *, wchar_t **);
  extern long     wstol(const wchar_t *, wchar_t **, int);
*** 87,97 ****
  extern int      wsprintf(wchar_t *, const char *, ...);
  #if defined(_LONGLONG_TYPE)
  extern long long        wstoll(const wchar_t *, wchar_t **, int);
  #endif  /* defined(_LONGLONG_TYPE) */
  
! #endif /* !defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX) */
  
  /* Returns the code set number for the process code c. */
  #define WCHAR_SHIFT     7
  #define WCHAR_S_MASK    0x7f
  #define wcsetno(c) \
--- 87,97 ----
  extern int      wsprintf(wchar_t *, const char *, ...);
  #if defined(_LONGLONG_TYPE)
  extern long long        wstoll(const wchar_t *, wchar_t **, int);
  #endif  /* defined(_LONGLONG_TYPE) */
  
! #endif /* !defined(_STRICT_SYMBOLS) */
  
  /* Returns the code set number for the process code c. */
  #define WCHAR_SHIFT     7
  #define WCHAR_S_MASK    0x7f
  #define wcsetno(c) \