[Fixed] [Since introduced] +CANTSEEK bug

[Major Cooke]

The +CANTSEEK flag introduces a rather serious bug with seeker missiles, especially auto-seeking ones. If it acquires an actor with +CANTSEEK, instead of the projectile attempting to refocus on another monster that it can seek, it goes in the straight path when fired. It will not attempt to acquire any other targets until the first one it acquired dies/stops existing.

[jpalomo]

Any idea if the same thing happens with +DONTSEEKINVISIBLE?

Edit: Included a test wad with +cantseek and +dontseekinvisible

[randi]

Wad, please.

[Major Cooke]

Alright. Let me wip something up real quick.

[randi]

Fixed.