When texturing from the entire 512 height of a framebuffer, we still
should not trigger the offset framebuffer code. This is expected to help
Danball Senki BOOST but not break Breath of Fire 3.
Region and scissor are 480x360, but viewport is just default (also,
throughmode is on.) We could add more checks, but just the height being a
bit higher is already unusual, so should be relatively safe.
Fixes#7277.
