Fix info corruption due to overlaping vars.

[dsvensson]

Ports the fix from engine/common/common.c to qtv.

[dsvensson]

Fairly frequently spotted on https://hub.quakeworld.nu/qtv/ ... the result is data soup, values ending up as keys, garbled strings etc. If a 4on4 match looks like it misses some players or other areas in the info corner, shift+esc /serverinfo is most likely also visibly trashed. Uppdate: fixed deployed so not visible any longer.

[dsvensson]

@Xylemon @eukara it's christmas! plox merge!

[eukara]

Same as with #283: Does this still apply with Spike's latest changes?

[Xylemon]

@Shpoike ping for feedback

[Shpoike]

this was already fixed...