Fix a bug in the memory storage layer where on the very first save of a game we saved a nil move record. Only found now because the machinery for #516 exercised it.
Fix a bug in the memory storage layer where on the very first save of a game we saved a nil move record. Only found now because the machinery for #516 exercised it.

jkomoros/boardgame,jkomoros/boardgame,jkomoros/boardgame