Add the flag to request an accelerated renderer

This is the default option.

Property definitions

sdl2 $ SDLRendererFlags :: accelerated
	# Add the flag to request an accelerated renderer
	#
	# This is the default option.
	fun accelerated: SDLRendererFlags `{ return self | SDL_RENDERER_ACCELERATED; `}
lib/sdl2/sdl2_base.nit:385,2--388,80