Fix a few typos in the comments/logging in VideoDX9, VideoCommon, and VideoSoftware projects. See Render.cpp, PixelShaderGen.cpp, and PixelShaderManager.cpp for most of the changes. See VertexShaderManager.cpp for a logging typo fix. See SWRenderer.cpp for a small typo fix for a message that gets swprintf'd in DrawDebugText. See SWVertexLoader.cpp for a typo fix of an assert message. Should slightly improve the readability of some of those files.