#88 host freeze trying to report task, null pointer exception

[Sebastian Brocks]

Playing an arena on megameknet.
Game froze during play, reloaded from autosave and
could continue the game until the very end.
After showing the victory screen, and offering to save
unit status, the client stops responding.

Reloading the save, it dies at the same point every time.

error.txt shows this:
Entity can't find player #1
Entity can't find player #1
Entity can't find player #1
java.lang.NullPointerException
at client.ClientThread.serializeEntity
(ClientThread.java:196)
at client.ClientThread.gamePhaseChange
(ClientThread.java:294)
at megamek.client.Client.processGameEvent
(Client.java:321)
at megamek.client.Client.changePhase
(Client.java:270)
at megamek.client.Client.run(Client.java:901)
at java.lang.Thread.run(Unknown Source)

This was wrongly reported as a MM bug, reposting here.