{Laser, Emg}Projectile: disable all collision-testing when ttl <= 0

these projectile types can EXCEED their range due to fadeout
and only remove themselves (deleteMe=true) when intensity or
length reaches 0, so without disabling coldet (checkCol=false)
range-exploits were possible

FYI: I *HATE* ALL THESE HIGHLY SPECIFIC VISUAL BEHAVIOR TAGS