don't ignore possible errors related to posix_fadvise
don't ignore possible errors related to posix_fadvise

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