Comment 1 for bug 1191296

In r6880, I was able to build a port next to the spot where my opponent had a occupied military building (a tower). Furthermore, a warehouse of my enemy was standing on the border while my port was being constructed. After its finish, the warehouse burnt down. I attach a replay where you can watch the different steps. It happens on the west side of the black territory. At the beginning of the replay, the tower is still under construction.