fixed compiler warning re uninitialized variable
fixed compiler warning re uninitialized variable

ged-lab/khmer,F1000Research/khmer,F1000Research/khmer,kdmurray91/khmer,jas14/khmer,ged-lab/khmer,Winterflower/khmer,jas14/khmer,souravsingh/khmer,Winterflower/khmer,souravsingh/khmer,ged-lab/khmer,Winterflower/khmer,souravsingh/khmer,kdmurray91/khmer,F1000Research/khmer,kdmurray91/khmer,jas14/khmer