Fixed menu font image for Mac

Not sure if this was a problem, but re-saved with GIMP so this image
should be good to go on Mac.
Changed unsigned char -> int for GameProgress

This was to fix a bug with Squirrel on Mac, where it tries to cast
between unsigned char and long, causing a crash.
Fixed menu rendering bug

Fixed a bug where the lives/etank cound don't appear on the pause menu.
Problem was an unreachable condition.
Merge pull request #138 from zackthehuman/master

Mac fixes (for etanks/lives)