tools/lg: seed frame_reader last_seq from shm header

A stale frame left in the kvmfr shm by a previous publisher run (xshm_pub
restarts its own seq at 1) was saved and then blocked the new run's frames
via the seq-collision rule. Seeding last_seq from the header's current seq
skips the stale frame and lets a fresh run's frames save normally.

0 files changed, 0 insertions, 0 deletions