Partial fix for bug 3092 - Statically link sdl2 with /MT for msvc

Mike Linford

I'm also having trouble statically linking SDL2 on Visual Studio 2015 with /MT. My symptom is that memcpy is being defined twice.

src/stdlib/SDL_stdlib.c

@@ -279,7 +279,7 @@ __declspec(selectany) int _fltused = 1;
 #endif
 
 /* The optimizer on Visual Studio 2005 and later generates memcpy() calls */
-#if (_MSC_VER >= 1400) && defined(_WIN64) && !defined(_DEBUG)
+#if (_MSC_VER >= 1400) && defined(_WIN64) && !defined(_DEBUG) && !(_MSC_VER >= 1900 && defined(_MT))
 #include <intrin.h>
 
 #pragma function(memcpy)