Fix segfault - null pointer dereference
Fix segfault - null pointer dereference

Fixes bzfs server segfault for /flag give CALLSIGN FLAG


kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1