Windows: Do not redefine _WIN32_WINNT

With MinGW runtime version 4.0 this interferes with the previous definition
from sdkddkver.h.

Signed-off-by: Sebastian Schuberth <[email protected]>

Author: sschuberth

compat/nedmalloc/malloc.c.h

@@ -495,7 +495,9 @@ MAX_RELEASE_CHECK_RATE   default: 4095 unless not HAVE_MMAP
 #endif  /* WIN32 */
 #ifdef WIN32
 #define WIN32_LEAN_AND_MEAN
+#ifndef _WIN32_WINNT
 #define _WIN32_WINNT 0x403
+#endif
 #include <windows.h>
 #define HAVE_MMAP 1
 #define HAVE_MORECORE 0

git-compat-util.h

@@ -105,7 +105,9 @@
 #endif
 
 #ifdef WIN32 /* Both MinGW and MSVC */
+#ifndef _WIN32_WINNT
 #define _WIN32_WINNT 0x0502
+#endif
 #define WIN32_LEAN_AND_MEAN  /* stops windows.h including winsock.h */
 #include <winsock2.h>
 #include <windows.h>