Fixed some really bad edge-cases that were caused by playing an online async game, then leaving it, then finishing a local game in the same run of the program.

Please make sure you have the latest version (which was released on Saturday, Dec 12th) and you should be safe from any unwanted issues related to this.

PS: If there is a steep sale on Reversi any time still in 2015, it will be the last steep sale we'll be able to do for quite a while! So grab it ;)

Cheers!