vo_opengl: fix backend autoprobing

We want the following behavior:
- VO probed, backend probed: only accept non-sw, fail completely
otherwise
- VO forced, backend probed: use the first non-sw, or if none is found,
fall back to the first working sw backend
- VO probed, backend forced: (I don't care about this case)
- VO forced, backend forced: just use that backend

Also, on backend probe failure the vo->probed field was left in its old
state.

0 files changed, 0 insertions, 0 deletions