[SqNOS] SqueakNOS-gera.37: Fix in LancePCIDevice for receive length

[Gerardo Richarte]

Name: SqueakNOS-gera.37
Author: gera
Time: 27 July 2006, 7:17:02 pm
UUID: d95b8826-3ec1-44f4-ad4f-a8e2f5a2d42c
Ancestors: SqueakNOS-gera.36

LancePCIDevice was reading 4 more bytes from the input buffer
(apparently the hardware reports the size including the CRC or
something... although this extra 4 bytes are always 0). This fixes that,
and also tells the hardware to strip any padding bytes.