make it clear when to consider a station a "ship in sector"
Should fix
http://www.forum.birth-of-the-empires.de/viewtopic.php?f=68&t=2559&p=33331#p33331
It seems that hull virus never emitted a message in case the only affected
ship was a station.
Very likely also fixes manager taking offline ship training buildings
in case the only ship in that sector is a station.
Perhaps also fixes race contact if a station is involved.