Do not output negative fragment size from x-correlation analysis.
Do not output negative fragment size from x-correlation analysis.

taoliu/MACS,vd4mmind/MACS,daler/MACS,vd4mmind/MACS,daler/MACS,vd4mmind/MACS,daler/MACS,taoliu/MACS,taoliu/MACS