Add sanity check on block length before attempting decompression
Add sanity check on block length before attempting decompression

sharkkid/kanzi,rzel/kanzi,Sputuks3/kanzi,Sputuks3/kanzi,rukistar/kanzi,rzel/kanzi,rukistar/kanzi,Sputuks3/kanzi,rzel/kanzi,rukistar/kanzi,sharkkid/kanzi,sharkkid/kanzi