added test for error condition on /dev/stdin
added test for error condition on /dev/stdin

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