fixed message log

- I noticed the message log didn't show messages about the monsters'
attacks. Go figure, it probably broke when I split main.cpp into
multiple source files, so messages handled within liventities.cpp would
vanish
- I've removed the static declaration from game.h, added it to main.cpp
instead, without static, and then add the extern to liventities.cpp
- It works.

Another lingering issue that, like blood stains not working, has been
probably broken for quite a while.