Fixed a build error in SDL_platform.h when using Code Blocks and MinGW

winapifamily.h, a header file specific to Microsoft's Windows 8 SDK, wasn't
getting found, which was leading to a build error.

--HG--
extra : rebase_source : 59ca0a462a0c2bb578d70553a53e9421f6cfb926
controllermap: Don't treat SDL_HAT_CENTERED as a valid input.

--HG--
extra : rebase_source : d3d69e6f0f44f04fb8bf910b5888a5040be579d3
Whitespace fix.
Fixed PS4 game controller config on Windows.