[fixed]Actor mover/interpolation point crash

[justin023]

If you use an actor mover to move something to an interpolation point that has it's own TID as the next point, the game crashes. This is more likely a zdoom bug than a gzdoom bug, but it happened with gzdoom so I'm putting it here. A couple crash reports and the wad are attached. The obvious answer is, "Don't do that, there is no reason to". It doesn't seem like a crash should happen because of this though.

[nwbeeman]

The obvious answer is, "Don't do that, there is no reason to". It doesn't seem like a crash should happen because of this though.

I think your right. Anything that causes a program to actually CRASH instead of an error to console or ignoring it should be reported, because Randy said and i'm shure Graf will agree, its better to be given a warning, instead of crashing.

[Graf Zahl]

Added a few NULL pointer checks.