unmapped reads were not being written out to an *.unmapped.sam file; skip refname * later on in mapping() so that we do not attempt to remap stuff from an unmapped.SAM file
unmapped reads were not being written out to an *.unmapped.sam file; skip refname * later on in mapping() so that we do not attempt to remap stuff from an unmapped.SAM file

cfe-lab/MiCall,cfe-lab/MiCall,cfe-lab/MiCall