DS: Switching to an unsupported resolution should return an error

[ccawley2011]

At the moment, if the selected screen mode is higher than the maximum supported values (512x512 for 8-bit and 512x256 for 16-bit), it will display a blank screen until the resolution is changed again. This is for the benefit of games like Lost in Time which only use higher resolution for title screens, but makes it harder for engines to fall back to lower resolutions if needed.