BF: try casting to the "old" type while comparing differences underlying hash values Closes gh-156
BF: try casting to the "old" type while comparing differences underlying hash values Closes gh-156

blakedewey/nipype,FredLoney/nipype,dmordom/nipype,christianbrodbeck/nipype,iglpdc/nipype,blakedewey/nipype,sgiavasis/nipype,dgellis90/nipype,mick-d/nipype_source,grlee77/nipype,iglpdc/nipype,arokem/nipype,dgellis90/nipype,mick-d/nipype,rameshvs/nipype,glatard/nipype,blakedewey/nipype,rameshvs/nipype,JohnGriffiths/nipype,christianbrodbeck/nipype,mick-d/nipype,mick-d/nipype_source,carolFrohlich/nipype,sgiavasis/nipype,FCP-INDI/nipype,iglpdc/nipype,rameshvs/nipype,pearsonlab/nipype,JohnGriffiths/nipype,sgiavasis/nipype,mick-d/nipype,dmordom/nipype,carolFrohlich/nipype,carolFrohlich/nipype,blakedewey/nipype,glatard/nipype,FredLoney/nipype,rameshvs/nipype,arokem/nipype,fprados/nipype,mick-d/nipype_source,wanderine/nipype,JohnGriffiths/nipype,glatard/nipype,carlohamalainen/nipype,grlee77/nipype,JohnGriffiths/nipype,iglpdc/nipype,gerddie/nipype,pearsonlab/nipype,dmordom/nipype,fprados/nipype,carlohamalainen/nipype,Leoniela/nipype,sgiavasis/nipype,FredLoney/nipype,FCP-INDI/nipype,Leoniela/nipype,dgellis90/nipype,dgellis90/nipype,wanderine/nipype,gerddie/nipype,pearsonlab/nipype,wanderine/nipype,glatard/nipype,arokem/nipype,FCP-INDI/nipype,mick-d/nipype,pearsonlab/nipype,Leoniela/nipype,carlohamalainen/nipype,grlee77/nipype,fprados/nipype,gerddie/nipype,FCP-INDI/nipype,grlee77/nipype,carolFrohlich/nipype,wanderine/nipype,gerddie/nipype,arokem/nipype