Added ISNULL macro designed to be used in place of (!k || *k == 0)
Added ISNULL macro designed to be used in place of (!k || *k == 0)

MarcNo/lifelines,disassembler/Lifelines,disassembler/Lifelines,MarcNo/lifelines,disassembler/Lifelines,MarcNo/lifelines,MarcNo/lifelines,disassembler/Lifelines