in Initialize() and Video_Prepare(). Video_Prepare()
then becomes the entry point for associating the current
thread with the rendering context, which is currently
only known to be necessary for OpenGL.
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@7195 8ced0084-cf51-0410-be5f-012b33b47a6e