Fix bug caused by blank section number
Fix bug caused by blank section number

CDLUC3/roadmap,CDLUC3/dmptool,DigitalCurationCentre/roadmap,CDLUC3/dmptool,DigitalCurationCentre/roadmap,DMPRoadmap/roadmap,DigitalCurationCentre/roadmap,CDLUC3/roadmap,CDLUC3/roadmap,CDLUC3/roadmap,DMPRoadmap/roadmap,CDLUC3/dmptool,DMPRoadmap/roadmap,CDLUC3/dmptool