Fixed: invalidated by-name sort order in some cases  * due to (unintentional) member variable stored as reference
Fixed: invalidated by-name sort order in some cases
 * due to (unintentional) member variable stored as reference

kdmurray91/bamtools,boratonAJ/bamtools,domibel/bamtools,domibel/bamtools,pezmaster31/bamtools,sksaskrobinsons/code,pezmaster31/bamtools,boratonAJ/bamtools,iontorrent/bamtools,SANBI-SA/bamtools,SANBI-SA/bamtools,pezmaster31/bamtools,sksaskrobinsons/code,kdmurray91/bamtools,pezmaster31/bamtools,iontorrent/bamtools