Fix problem with newer MinGW runtimes

src/porting.cpp

@@ -23,6 +23,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 	See comments in porting.h
 */
 
+#include "porting.h"
+
 #if defined(__APPLE__)
 	#include <mach-o/dyld.h>
 	#include "CoreFoundation/CoreFoundation.h"
@@ -37,7 +39,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 	#include <sys/utsname.h>
 #endif
 
-#include "porting.h"
 #include "config.h"
 #include "debug.h"
 #include "filesys.h"

src/porting.h

@@ -24,6 +24,14 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #ifndef PORTING_HEADER
 #define PORTING_HEADER
 
+#ifdef _WIN32
+	#ifdef _WIN32_WINNT
+		#undef _WIN32_WINNT
+	#endif
+	#define _WIN32_WINNT 0x0501 // We need to do this before any other headers 
+		// because those might include sdkddkver.h which defines _WIN32_WINNT if not already set
+#endif
+
 #include <string>
 #include "irrlichttypes.h" // u32
 #include "debug.h"
@@ -42,9 +50,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 //#define ALIGNOF(type) offsetof (alignment_trick<type>, member)
 
 #ifdef _WIN32
-	#ifndef _WIN32_WINNT
-		#define _WIN32_WINNT 0x0501
-	#endif
 	#include <windows.h>
 	
 	#define sleep_ms(x) Sleep(x)