Include check for value == null in dump method.
Include check for value == null in dump method.

getBytes also now returns new byte[] {} if value is null

dump NPE reported by Shin

barspi/jPOS,chhil/jPOS,alcarraz/jPOS,poynt/jPOS,jpos/jPOS,poynt/jPOS,barspi/jPOS,yinheli/jPOS,c0deh4xor/jPOS,fayezasar/jPOS,jpos/jPOS,sebastianpacheco/jPOS,fayezasar/jPOS,yinheli/jPOS,atancasis/jPOS,imam-san/jPOS-1,bharavi/jPOS,alcarraz/jPOS,chhil/jPOS,sebastianpacheco/jPOS,imam-san/jPOS-1,bharavi/jPOS,atancasis/jPOS,juanibdn/jPOS,bharavi/jPOS,jpos/jPOS,juanibdn/jPOS,juanibdn/jPOS,poynt/jPOS,barspi/jPOS,yinheli/jPOS,imam-san/jPOS-1,sebastianpacheco/jPOS,c0deh4xor/jPOS,atancasis/jPOS,c0deh4xor/jPOS,alcarraz/jPOS