little memleak: group AI destructor is not called

[jcnossen]

If I see it correctly, IGroupAI has no virtual destructor and therefore the ReleaseAI function inside the AI dlls doesn't call the correct destructor.

[SJ]

Hmm thats correct I better fix it.

[PauloMorfeo]

It has happened to me to see the Battleroom grow from a few MBs at the time i start it to some 180 MBs after a few games are played. Must be something of the sort...

Of course it has a simple solution... Restart the Battleroom client once in a while.

[el_muchacho]

Yes, the map selection doesn't seem to release memory. Consumption goes up by 2 Mb every time one clicks on a new map.