BUG: fix small bug in OneTimeProperty for docs to build.
BUG: fix small bug in OneTimeProperty for docs to build.

git-svn-id: 24f545668198cdd163a527378499f2123e59bf9f@185 ead46cd0-7350-4e37-8683-fc4c6f79bf00

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