fixed type on field
fixed type on field

solved coding error

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