Fixed building with the first version of Visual Studio 2017, which doesn't have __has_include() (Thanks Simon!)
diff --git a/include/SDL_platform.h b/include/SDL_platform.h
index 75224a0..9dde385 100644
--- a/include/SDL_platform.h
+++ b/include/SDL_platform.h
@@ -120,7 +120,7 @@
#if defined(WIN32) || defined(_WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
/* Try to find out if we're compiling for WinRT or non-WinRT */
-#if defined(_MSC_VER) && _MSC_VER >= 1910 /* _MSC_VER == 1910 for Visual Studio 2017 */
+#if defined(_MSC_VER) && defined(__has_include)
#define HAVE_WINAPIFAMILY_H __has_include(<winapifamily.h>)
/* If _USING_V110_SDK71_ is defined it means we are using the Windows XP toolset. */
#elif defined(_MSC_VER) && (_MSC_VER >= 1700 && !_USING_V110_SDK71_) /* _MSC_VER == 1700 for Visual Studio 2012 */