patch from rkr - don't try referencing out-of-bounds sound samples.  fixes crash in menu on his machine.
patch from rkr - don't try referencing out-of-bounds sound samples.  fixes crash in menu on his machine.


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