[flatten jar] Fix NPE in removing signatures
[flatten jar] Fix NPE in removing signatures

Signed-off-by: Peter Kriens <016a769244db65ccbb64c8b271e9b7b28d4a3ce8@aqute.biz>

magnet/bnd,lostiniceland/bnd,lostiniceland/bnd,GEBIT/bnd,xtracoder/bnd,lostiniceland/bnd,mcculls/bnd,psoreide/bnd,xtracoder/bnd,magnet/bnd,mcculls/bnd,GEBIT/bnd,joansmith/bnd,magnet/bnd,psoreide/bnd,mcculls/bnd,psoreide/bnd,joansmith/bnd