Bug fix when URL field is empty.
Bug fix when URL field is empty.

RENCI/xDCIShare,hydroshare/hydroshare,RENCI/xDCIShare,FescueFungiShare/hydroshare,RENCI/xDCIShare,ResearchSoftwareInstitute/MyHPOM,ResearchSoftwareInstitute/MyHPOM,ResearchSoftwareInstitute/MyHPOM,ResearchSoftwareInstitute/MyHPOM,ResearchSoftwareInstitute/MyHPOM,hydroshare/hydroshare,RENCI/xDCIShare,FescueFungiShare/hydroshare,hydroshare/hydroshare,FescueFungiShare/hydroshare,hydroshare/hydroshare,FescueFungiShare/hydroshare,hydroshare/hydroshare,RENCI/xDCIShare,FescueFungiShare/hydroshare