Minor base capture issue

[erstad]

When a base is captured, if the base had a "supply pull" on, the capturing side inherits the supply pull. (At least, I assume that's what is happening. I often see the supply pull on the turn after I capture a base).

Not a big deal, but it would be nice to clear the supply pull flag to avoid unintended supply movement if the base falls day 1 of a multi-turn sequence, or if the capturing side doesn't notice it right away.