wsi/wayland: fix error path

Fixes: 1720bbd353d87412754f ("anv/wsi: split image alloc/free out to separate fns.")
Cc: "13.0" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
1 file changed