segfault when starting game with non latin symbol in workdir

[Former user]

Hi, I compiled the game (latest git version) under Ubuntu 14 and when starting it i get the a segfault. I found that non latin symbol in work folder, such /home/Михалыч/test/caesaria-test, was crash game execution

[dalerank]

fix #98. Show warning when font can't be found.

→ <<cset 920247fdecfa>>