Move _wspawn functions from process.h to stdio.h and wchar.h.

See http://msdn.microsoft.com/en-us/library/20y988d2.aspx
for more details.

mingw-w64-headers/crt/process.h

diff --git a/mingw-w64-headers/crt/process.h b/mingw-w64-headers/crt/process.h
index 901a886..9b36daa 100644
--- a/mingw-w64-headers/crt/process.h
+++ b/mingw-w64-headers/crt/process.h
@@ -78,8 +78,8 @@
   int __cdecl system(const char *_Command);
 #endif
 
-#ifndef _WPROCESS_DEFINED
-#define _WPROCESS_DEFINED
+#ifndef _WEXEC_DEFINED
+#define _WEXEC_DEFINED
   _CRTIMP intptr_t __cdecl _wexecl(const wchar_t *_Filename,const wchar_t *_ArgList,...);
   _CRTIMP intptr_t __cdecl _wexecle(const wchar_t *_Filename,const wchar_t *_ArgList,...);
   _CRTIMP intptr_t __cdecl _wexeclp(const wchar_t *_Filename,const wchar_t *_ArgList,...);
@@ -88,6 +88,10 @@
   _CRTIMP intptr_t __cdecl _wexecve(const wchar_t *_Filename,const wchar_t *const *_ArgList,const wchar_t *const *_Env);
   _CRTIMP intptr_t __cdecl _wexecvp(const wchar_t *_Filename,const wchar_t *const *_ArgList);
   _CRTIMP intptr_t __cdecl _wexecvpe(const wchar_t *_Filename,const wchar_t *const *_ArgList,const wchar_t *const *_Env);
+#endif
+
+#ifndef _WSPAWN_DEFINED
+#define _WSPAWN_DEFINED
   _CRTIMP intptr_t __cdecl _wspawnl(int _Mode,const wchar_t *_Filename,const wchar_t *_ArgList,...);
   _CRTIMP intptr_t __cdecl _wspawnle(int _Mode,const wchar_t *_Filename,const wchar_t *_ArgList,...);
   _CRTIMP intptr_t __cdecl _wspawnlp(int _Mode,const wchar_t *_Filename,const wchar_t *_ArgList,...);
@@ -96,11 +100,12 @@
   _CRTIMP intptr_t __cdecl _wspawnve(int _Mode,const wchar_t *_Filename,const wchar_t *const *_ArgList,const wchar_t *const *_Env);
   _CRTIMP intptr_t __cdecl _wspawnvp(int _Mode,const wchar_t *_Filename,const wchar_t *const *_ArgList);
   _CRTIMP intptr_t __cdecl _wspawnvpe(int _Mode,const wchar_t *_Filename,const wchar_t *const *_ArgList,const wchar_t *const *_Env);
+#endif
+
 #ifndef _CRT_WSYSTEM_DEFINED
 #define _CRT_WSYSTEM_DEFINED
   _CRTIMP int __cdecl _wsystem(const wchar_t *_Command);
 #endif
-#endif
 
   void __cdecl __security_init_cookie(void);
 #if (defined(_X86_) && !defined(__x86_64))

mingw-w64-headers/crt/stdio.h

diff --git a/mingw-w64-headers/crt/stdio.h b/mingw-w64-headers/crt/stdio.h
index 32bcca1..825281f 100644
--- a/mingw-w64-headers/crt/stdio.h
+++ b/mingw-w64-headers/crt/stdio.h
@@ -950,6 +950,18 @@
 
 #endif /* __MINGW_MBWC_CONVERT_DEFINED */
 
+#ifndef _WSPAWN_DEFINED
+#define _WSPAWN_DEFINED
+  _CRTIMP intptr_t __cdecl _wspawnl(int _Mode,const wchar_t *_Filename,const wchar_t *_ArgList,...);
+  _CRTIMP intptr_t __cdecl _wspawnle(int _Mode,const wchar_t *_Filename,const wchar_t *_ArgList,...);
+  _CRTIMP intptr_t __cdecl _wspawnlp(int _Mode,const wchar_t *_Filename,const wchar_t *_ArgList,...);
+  _CRTIMP intptr_t __cdecl _wspawnlpe(int _Mode,const wchar_t *_Filename,const wchar_t *_ArgList,...);
+  _CRTIMP intptr_t __cdecl _wspawnv(int _Mode,const wchar_t *_Filename,const wchar_t *const *_ArgList);
+  _CRTIMP intptr_t __cdecl _wspawnve(int _Mode,const wchar_t *_Filename,const wchar_t *const *_ArgList,const wchar_t *const *_Env);
+  _CRTIMP intptr_t __cdecl _wspawnvp(int _Mode,const wchar_t *_Filename,const wchar_t *const *_ArgList);
+  _CRTIMP intptr_t __cdecl _wspawnvpe(int _Mode,const wchar_t *_Filename,const wchar_t *const *_ArgList,const wchar_t *const *_Env);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

mingw-w64-headers/crt/wchar.h

diff --git a/mingw-w64-headers/crt/wchar.h b/mingw-w64-headers/crt/wchar.h
index 3fbd17f..88cb24c 100644
--- a/mingw-w64-headers/crt/wchar.h
+++ b/mingw-w64-headers/crt/wchar.h
@@ -300,9 +300,8 @@
   _CRTIMP wchar_t *__cdecl _wsetlocale(int _Category,const wchar_t *_Locale);
 #endif
 
-#ifndef _WPROCESS_DEFINED
-#define _WPROCESS_DEFINED
-
+#ifndef _WEXEC_DEFINED
+#define _WEXEC_DEFINED
   _CRTIMP intptr_t __cdecl _wexecl(const wchar_t *_Filename,const wchar_t *_ArgList,...);
   _CRTIMP intptr_t __cdecl _wexecle(const wchar_t *_Filename,const wchar_t *_ArgList,...);
   _CRTIMP intptr_t __cdecl _wexeclp(const wchar_t *_Filename,const wchar_t *_ArgList,...);
@@ -311,6 +310,10 @@
   _CRTIMP intptr_t __cdecl _wexecve(const wchar_t *_Filename,const wchar_t *const *_ArgList,const wchar_t *const *_Env);
   _CRTIMP intptr_t __cdecl _wexecvp(const wchar_t *_Filename,const wchar_t *const *_ArgList);
   _CRTIMP intptr_t __cdecl _wexecvpe(const wchar_t *_Filename,const wchar_t *const *_ArgList,const wchar_t *const *_Env);
+#endif
+
+#ifndef _WSPAWN_DEFINED
+#define _WSPAWN_DEFINED
   _CRTIMP intptr_t __cdecl _wspawnl(int _Mode,const wchar_t *_Filename,const wchar_t *_ArgList,...);
   _CRTIMP intptr_t __cdecl _wspawnle(int _Mode,const wchar_t *_Filename,const wchar_t *_ArgList,...);
   _CRTIMP intptr_t __cdecl _wspawnlp(int _Mode,const wchar_t *_Filename,const wchar_t *_ArgList,...);
@@ -319,11 +322,12 @@
   _CRTIMP intptr_t __cdecl _wspawnve(int _Mode,const wchar_t *_Filename,const wchar_t *const *_ArgList,const wchar_t *const *_Env);
   _CRTIMP intptr_t __cdecl _wspawnvp(int _Mode,const wchar_t *_Filename,const wchar_t *const *_ArgList);
   _CRTIMP intptr_t __cdecl _wspawnvpe(int _Mode,const wchar_t *_Filename,const wchar_t *const *_ArgList,const wchar_t *const *_Env);
+#endif
+
 #ifndef _CRT_WSYSTEM_DEFINED
 #define _CRT_WSYSTEM_DEFINED
   _CRTIMP int __cdecl _wsystem(const wchar_t *_Command);
 #endif
-#endif
 
 #ifndef _WCTYPE_INLINE_DEFINED
 #undef _CRT_WCTYPE_NOINLINE