Prevent rare crash when player disconnects during War Games intro

[LightBlueCube]

[15:02:59] [NORTHSTAR] [info] Player Elyearend disconnected: "Disconnect by user."
[15:02:59] [NORTHSTAR] [info] Player Elyearend disconnected: "Disconnect by user."
[15:02:59] [NORTHSTAR] [warn] attempted to write pdata of size 0!
[15:02:59] [SCRIPT SV] [info] SCRIPT ERROR: [SERVER] Attempted to call GetPersistentVar on invalid entity
[15:02:59] [SCRIPT SV] [info] -> return expect string ( player.GetPersistentVar( "factionChoice" ) )
[15:02:59] [SCRIPT SV] [info]
CALLSTACK
*FUNCTION [GetFactionChoice()] conversation/sh_faction_dialogue.gnut line [136]
*FUNCTION [ConvertPlayerFactionToIMCOrMilitiaTeam()] conversation/sh_faction_dialogue.gnut line [188]
*FUNCTION [PlayerWatchesWargamesIntro()] mp/levels/mp_wargames.nut line [260]
[15:02:59] [SCRIPT SV] [info] LOCALS
[player] ENTITY (NULL)
[this] TABLE
[player] ENTITY (NULL)
[this] TABLE
[player] ENTITY (NULL)
[this] TABLE
DIAGPRINTS
0114:fixme:msvcrt:__clean_type_info_names_internal (00006FFFFDD58788) stub
nswrap: northstar exited with status 3
nswrap: killing xvfb
nswrap: waiting for children to exit

that really need a lot of luck
i fell like i lost a winning ticket
sorry for my bad english :(

[ASpoonPlaysGames]

Code looks good, unfortunate that a client disconnected on that exact frame I guess

[Zanieon]

This code is old, it still does the trick of killing the player and respawning immediately to secure logic.

I'll approve this as this is a good fix for the current way this code is implemented, but this requires a proper update later.