don't assume windows gaming input available for mingw (#18)

Co-authored-by: Jay Petacat <[email protected]>

Author: rohlem

include/SDL_config_windows.h

@@ -93,8 +93,10 @@ typedef unsigned int uintptr_t;
 #define HAVE_DXGI_H 1
 #define HAVE_XINPUT_H 1
 #if defined(_WIN32_MAXVER) && _WIN32_MAXVER >= 0x0A00  /* Windows 10 SDK */
+#if !defined(__MINGW32__) /* Header removed from Zig 0.14.0-dev in https://github.com/ziglang/zig/pull/22156 */
 #define HAVE_WINDOWS_GAMING_INPUT_H 1
 #endif
+#endif
 #if defined(_WIN32_MAXVER) && _WIN32_MAXVER >= 0x0602  /* Windows 8 SDK */
 #define HAVE_D3D11_H 1
 #if !defined(_MSC_VER)