#12 Game halts when starting SC1Arena game mode

[Paul Forest]

Game halts when starting SC1Arena game mode.

Steps to reproduce:
1. Start game.
2. From main menu, click SC1Arena.
3. Game displays options to start the game; mouse can move.
4. Within 2 seconds, the mouse cannot move, keys do not
respond and the music gets stuck. The game is in an
infinite loop or something. (This is the issue)