Single Troop Defenses

@Sirrian The single troop defence fix introduced a bug. I ran into one player who has probably set all teams to one card - see screenshots.
When i matched 4 in a row the game froze.
I tried a couple of matches, it happens every time - tested on iPad iOS 10.3.2 and iPhone iOS 10.3.3. Manual match 4 or 5 results in a freeze where the game has to be restarted. Match 4 or 5 with the help of a transformer or gem generator card works fine.

Please fix it or stop people from exploiting this. Thx!