Re_check Routine:
This routine is run when Torque has just tried to frag an enemy. It
checks whether the enemy is still within one square of the obstruction
that was used to frag it (i.e. the enemy is still alive) and launches another
missile or grenade if the enemy is still there.
If the enemy is not there any more, then Torque goes back to his normal
hunting routines, to find another enemy.