Fixed Issue #0NR: duplicate ipaddr and refurl fields are generated in the sql query while activating a survey (which eventually breaks the survey activation for surveys with ipaddr and/or refurl set to On)

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/limesurvey@8600 b72ed6b6-b9f8-46b5-92b4-906544132732