Out of memory errors should work nicer

[k776]

See http://www.wildfiregames.com/forum/index.php?showtopic=14859

We should show them a warning in game about out of memory, not just in the logs.

[historic_bruno]

I agree Spidermonkey OOM errors should be handled better (see #742), but it's actually more complicated than it sounds. The normal way of handling SM errors won't work because OOM errors are designed not to halt the script but to let it keep running. I don't see that being solved for A6 and maybe should wait for SM to be upgraded anyway before we mess too much with its internals.

In the short term, we should ensure OOM errors don't occur in normal operation, probably by increasing the script runtime size for the map generator from 96MB to whatever is enough to make it work (although even the simulation scripts will give OOM errors when there's too many trees, for instance).

[historic_bruno]

That issue was solved in [9664], so this will probably be an A7 ticket at the soonest.

[k776]

Fixed in Alpha 6. There might be more issues, but we'll address them as they show up.