#2 Update code to SDL2

[Martin Iturbide]

Hello

Please, do you think it can be possible to update the source code so 2Pong will work with SDL 2?

I noticed it reference some things on SDL 1 that are no longer used on SDL 2 like:

• SDL_SRCCOLORKEY
• SDL_DisplayFormat
• SDL_Flip

I got this reference: https://wiki.libsdl.org/SDL2/MigrationGuide

Thanks