Misc: small bugfix to perturb_params
Misc: small bugfix to perturb_params



git-svn-id: 4c7b13231a96299fde701bb5dec4bd2aaf383fc6@235 979d6bd5-6d4d-0410-bece-f567c23bd345

ChenHsiang/dadi,paulirish/dadi,niuhuifei/dadi,cheese1213/dadi,yangjl/dadi,cheese1213/dadi,RyanGutenkunst/dadi,beni55/dadi,niuhuifei/dadi,paulirish/dadi,RyanGutenkunst/dadi,beni55/dadi,yangjl/dadi,ChenHsiang/dadi