when the killer is invalid assume the server is respnsible for the kill from bz_KillPlayer
when the killer is invalid assume the server is respnsible for the kill from bz_KillPlayer

git-svn-id: c0942edff5350604e2827ab28bdfcfa5200fadee@16337 08b3d480-bf2c-0410-a26f-811ee3361c24

kongr45gpen/bzflag,kongr45gpen/bzflag,khonkhortisan/bzflag,kongr45gpen/bzflag,khonkhortisan/bzflag,khonkhortisan/bzflag,adamsdadakaeti/bzflag,khonkhortisan/bzflag,adamsdadakaeti/bzflag,kongr45gpen/bzflag,adamsdadakaeti/bzflag,kongr45gpen/bzflag,adamsdadakaeti/bzflag,adamsdadakaeti/bzflag,kongr45gpen/bzflag,adamsdadakaeti/bzflag,khonkhortisan/bzflag,khonkhortisan/bzflag,adamsdadakaeti/bzflag,kongr45gpen/bzflag,kongr45gpen/bzflag,khonkhortisan/bzflag