Made torps and fighter wobbly. They have a chance of tracking randomly instead of staying straight or seeking if in nebulous terrain. Option is turned on when NEBULA_EFFECT contains PHOTON and/or FIGHTER.

/*
 * common.h
 */


#define err_fatal(x) {err(x); exit(1);}

#define err_sys_fatal(x) {err_sys(x); exit(1);}

#define VERSSTR "1.1"