isdefined related fixes
isdefined related fixes

git-svn-id: 24f545668198cdd163a527378499f2123e59bf9f@1218 ead46cd0-7350-4e37-8683-fc4c6f79bf00

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