fix for non-8-bit-multiples

gistfile1.txt

                // Packet is 1 bit per byte, pack to 8-bits per byte.
                for pIdx := 0; pIdx < len(d.pkt)*8; pIdx++ {
                        d.pkt[pIdx>>3] <<= 1
                        if pIdx < d.Cfg.PacketSymbols {
                                d.pkt[pIdx>>3] |= d.Quantized[qIdx+(pIdx*d.Cfg.SymbolLength2)]
                        } else {        // zero out last bits past PacketSymbols
                                d.pkt[pIdx>>3] |= 0
                        }
                }