Fixes artifacts on some games that relied on occlusion query results when no PS or depth buffers are bound. Signed-off-by: Tapani Pälli <tapani.palli@intel.com> Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21721>