move debug code defines into header

src/directinput.c

@@ -1,6 +1,5 @@
 #include <windows.h>
 #include <initguid.h>
-#include <intrin.h>
 #include "directinput.h"
 #include "debug.h"
 #include "hook.h"
@@ -8,15 +7,6 @@
 #include "mouse.h"
 #include "config.h"
 
-#if defined(__GNUC__) /* wrap msvc intrinsics onto gcc builtins */
-#undef  _ReturnAddress
-#undef  _AddressOfReturnAddress
-#define _ReturnAddress()		__builtin_return_address(0)
-#define _AddressOfReturnAddress()	__builtin_frame_address (0)
-#else
-#pragma intrinsic(_ReturnAddress)
-#endif /* __GNUC__ */
-
 #ifdef _MSC_VER
 #include "detours.h"
 #endif