Build 051020 - revision 4

A small bugfix/upgrade this time:

• Tracked down and fixed a minor glitch condition: if the headlight is off, ARS HUD is on, world wireframe is on, no projectiles are present and no enemies play their "init-red-light" animation, the world wires would be replaced with a projectile mesh.
• Mines are now spawned de-centered during the random enemy attacks.

If anyone wonders how to enter the rouge-like random attack mode, progress past the last wave (a huge crowd with a few mines among it), you have to clear a wave without taking a hit in order to progress to the next one. Or you can just cheat by starting the game with "-startrandom" switch, which causes it to start at the random spawn stage right off.