Treat SendDataRequest sane as SendStatus during Latency wat periods. It was freezing only when "Normal Seek" was in place; this seems to be a result of sending data requests during wait periods, when statuses were not sent.
1) Fix for Issue 120 broke timing for cut-scene videos. Restoring delay for SAPSP-type seeks (issue #145)
2) fixes for issues #120 & #145:
a) PAUSE placed head just outside of minimum-seektime area -> when playback was restored, it was late, contributing to hangs (i.e. Bomberman Panic Bomber). Increase minimum seektime region, so as to include this case.
b) Moved logging printf to AFTER SendStatus on SAPEP transactions; may help reduce hangs (i.e. Bomberman Panic Bomber).
3) Minor adjustment to improve timing on Sherlock Holmes games' video playback.
* pcecd: read 256 sectors when length is 0 (Kabuki Itouryodan).
* pcecd: send status immediately for commands with instant execution (Bomberman: Panic Bomber), some cleanup
