fix detecting nil feed (temp fix, need to find out how it ends up nil)
fix detecting nil feed (temp fix, need to find out how it ends up nil)

HITS-SDBV/seek,kjgarza/frame_experiment,Virtual-Liver-Network/seek,aina1205/SysMO-DB-seek,aina1205/nmtrypi-seek,kjgarza/frame_experiment,Virtual-Liver-Network/seek,BioVeL/seek,stuzart/seek,HITS-SDBV/nmtrypi-seek,HITS-SDBV/seek,BioVeL/seek,HITS-SDBV/nmtrypi-seek,aina1205/nmtrypi-seek,HITS-SDBV/seek,aina1205/SysMO-DB-seek,HITS-SDBV/nmtrypi-seek,SynthSys/seek,aina1205/nmtrypi-seek,HITS-SDBV/seek,kjgarza/frame_experiment,SynthSys/seek,SynthSys/seek,SynthSys/seek,aina1205/SysMO-DB-seek,BioVeL/seek,stuzart/seek,aina1205/nmtrypi-seek,Virtual-Liver-Network/seek,stuzart/seek,kjgarza/frame_experiment,HITS-SDBV/nmtrypi-seek,BioVeL/seek,Virtual-Liver-Network/seek