Fix EndRound exception when a mind doesn't have a character name nor valid entity.
Fix EndRound exception when a mind doesn't have a character name nor valid entity.

space-wizards/space-station-14,space-wizards/space-station-14,space-wizards/space-station-14,space-wizards/space-station-14,space-wizards/space-station-14,space-wizards/space-station-14