Passengers' ProvidesPrerequisite is ignored.

[GraionDilach]

So I have a neutral mercenary faction with a hero. I had this idea that by capturing the mercenary tech building, the player can either

• build the merc barracks and train the hero normally
• call in a paradrop of an APC-akin with the hero inside.

I put a ProvidesPrerequisite on the hero which prevents the APC call-in when he's around, however when he's sitting in the APC, the paradrop is still available. Note that I consider the APC disposable, so it's not the APC which should prevent that paradrop, but only the hero.

Semi-related to #5872.

[pchote]

You could hack around this by making the passenger apply an upgrade to the transport that enables the prereq.