Return active_link_ids as np.int.
Return active_link_ids as np.int.

landlab/landlab,cmshobe/landlab,RondaStrauch/landlab,amandersillinois/landlab,cmshobe/landlab,decvalts/landlab,RondaStrauch/landlab,Carralex/landlab,RondaStrauch/landlab,laijingtao/landlab,landlab/landlab,decvalts/landlab,ManuSchmi88/landlab,amandersillinois/landlab,csherwood-usgs/landlab,landlab/landlab,ManuSchmi88/landlab,laijingtao/landlab,Carralex/landlab,SiccarPoint/landlab,cmshobe/landlab,ManuSchmi88/landlab,csherwood-usgs/landlab,Carralex/landlab,SiccarPoint/landlab