Prefix _fsopen with MSVCRT_ to avoid collision with MinGW header.

dlls/msvcrt/file.c

@@ -2183,7 +2183,7 @@ MSVCRT_FILE *MSVCRT__wfopen(const MSVCRT_wchar_t *path, const MSVCRT_wchar_t *mo
 /*********************************************************************
  *		_fsopen (MSVCRT.@)
  */
-MSVCRT_FILE*  _fsopen(const char *path, const char *mode, int share)
+MSVCRT_FILE*  MSVCRT__fsopen(const char *path, const char *mode, int share)
 {
   FIXME(":(%s,%s,%d),ignoring share mode!\n",path,mode,share);
   return MSVCRT_fopen(path,mode);

dlls/msvcrt/msvcrt.h

@@ -20,7 +20,7 @@
  *   Naming conventions
  *	- Symbols are prefixed with MSVCRT_ if they conflict
  *        with libc symbols
- *      - Internal symbolx are usually prefixed by msvcrt_.
+ *      - Internal symbols are usually prefixed by msvcrt_.
  *      - Exported symbols that are not present in the public
  *        headers are usually kept the same as the original.
  *   Other conventions

dlls/msvcrt/msvcrt.spec

@@ -239,7 +239,7 @@
 @ cdecl _fpreset()
 @ cdecl _fputchar(long)
 @ cdecl _fputwchar(long)
-@ cdecl _fsopen(str str long)
+@ cdecl _fsopen(str str long) MSVCRT__fsopen
 @ cdecl _fstat(long ptr) MSVCRT__fstat
 @ cdecl _fstati64(long ptr) MSVCRT__fstati64
 @ cdecl _ftime(ptr)