Fix termination errors

Cleanup for objects destruction and process termination.
This is still work in progress, I don't like the way it's
handled right now.

graphics/src/window.c

@@ -62,6 +62,4 @@ rse_err_t window_loop(struct graphics_context_t* context)
 void window_terminate(SDL_Window* window_handle)
 {
     SDL_DestroyWindow(window_handle);
-
-    SDL_Quit();
 }