fix errors and warnings with mingw
Merge pull request #250 from anyc/testing

fix errors and warnings with mingw
Make window resizable again.

Note: I can't simple place SDL_WINDOW_RESIZABLE in _fullscreen_modes[] because SDL ignores this flag in SDL_SetWindowFullscreen and if the user started the game in fullscreen and switched to window, it wouldn't be resizable.
The way I did it is the only way I know to make the window resizable regardless of whether the game was first started in window or in fullscreen.
Fixes #249
Merge pull request #252 from adrian17/resizable_fix

Make window resizable again.
Merge pull request #253 from duncanspumpkin/fix_249

Fixes #249
Fixes issue where sound stops working after cancel is pressed
Merge pull request #254 from duncanspumpkin/fix_exit_sound

Fixes issue where sound stops working after cancel is pressed
started decompile of paint quadrant function
Fixed compile error added reference to address
Decompiled to end of sprite draw.