Fixed: a player with an incredibly long name that won the game after the timer expired could crash the game.

A player with a very long name (e.g. a name that uses many "new text" colour codes) could cause the game to crash if they won a deathmatch game when the timer expired. This was because this part of the code was still using a C-style char array to store the "player wins!" message instead of the more versatile FString object.