Bug#691107: Further testing

[Jesse Smith]

I have discovered something else of interest. During my tests I have
found that if I build Atanks with GCC 4.7 and use optimizations (-O2)
then the game will crash when I try to access the Options screen.
However, with all optimizations turned off the game does not crash, it
just displays strange symbols along the top of the Options screen.

Not sure exactly what this means, but if the game is compiled from
source and doesn't optimize, it may allow the player to change settings.