Core: Ports, inportiterable fix for empty vectors.
Core: Ports, inportiterable fix for empty vectors.


Sparkier/inviwo,inviwo/inviwo,inviwo/inviwo,Sparkier/inviwo,Sparkier/inviwo,inviwo/inviwo,Sparkier/inviwo,Sparkier/inviwo,inviwo/inviwo,inviwo/inviwo,inviwo/inviwo