[Ohrrpgce] SVN: teeemcee/7737 Fix gfx_sdl_recenter_window_hint not working on Windows.

[subversion at HamsterRepublic.com]

teeemcee
2016-02-28 04:20:05 -0800 (Sun, 28 Feb 2016)
238
Fix gfx_sdl_recenter_window_hint not working on Windows.

Workaround SDL_VIDEO_CENTERED not working by quitting and reiniting the video subsys.

Also got rid of waiting_for_resize which did nothing since window resize on Windows was fixed
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U   wip/gfx_sdl.bas