Massivly increases the accuracy of VideoSoftware, if it's going to be slow, it
might as well be accurate.
* Fixes flickering issues in games which double render to get Hardware AA, like the Peach's Castle tech demo.
* Rouge Squadren 2's Cantina Intro doesn't flicker anymore, but it duplicates the top half of the screen onto the bottom.
* Any games which need RealXFB support should now work in Video Software
They were named incorrectly in VideoInterface.h, but because nobody used
them outside of VideoInterface.cpp where they were decleared until now, this
hasn't been an issue.
Scott Mansell