Remove ifdefs for _FX_MANAGED_CODE_.

third_party/zlib_v128/gzguts.h

 /* gzguts.h -- zlib internal header definitions for gz* operations
  * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
 #ifdef _LARGEFILE64_SOURCE
 #  ifndef _LARGEFILE_SOURCE
 #    define _LARGEFILE_SOURCE 1
 #  endif
 #  ifdef _FILE_OFFSET_BITS
@@ skipping 98 matching lines @@
 #  define local static
 #endif
 /* compile with -Dlocal if your debugger can't find static symbols */
 
 /* gz* functions always use library allocation functions */
 #ifndef STDC
   extern voidp  malloc OF((uInt size));
   extern void   free   OF((voidpf ptr));
 #endif
 
-#if defined(_FX_MANAGED_CODE_) && defined(__cplusplus)
-extern "C" {
-#endif
-
 extern void* FXMEM_DefaultAlloc(size_t, int);
 extern void FXMEM_DefaultFree(void*, int);
 
-#if defined(_FX_MANAGED_CODE_) && defined(__cplusplus)
-}
-#endif
-
 #define malloc(size) FXMEM_DefaultAlloc(size, 0)
 #define free(ptr) FXMEM_DefaultFree(ptr, 0)
 
 /* get errno and strerror definition */
 #if defined UNDER_CE
 #  include <windows.h>
 #  define zstrerror() gz_strwinerror((DWORD)GetLastError())
 #else
 #  ifndef NO_STRERROR
 #    include <errno.h>
@@ skipping 76 matching lines @@
 
 /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
    value -- needed when comparing unsigned to z_off64_t, which is signed
    (possible z_off64_t types off_t, off64_t, and long are all signed) */
 #ifdef INT_MAX
 #  define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX)
 #else
 unsigned ZLIB_INTERNAL gz_intmax OF((void));
 #  define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
 #endif