Spotted by Austin English.

d3d9/tests: Test that Direct3D9 doesn't modify the pixel format of the window it targets. (try 4, resend).

wined3d: Make context_update_window() just mark the GL context as needing to be set rather than setting it.

The new needs_set flag can be cleared after it's been heeded whereas restore_ctx
must not be cleared until the context has been released back to level 0.