1. Added validation to check whether the unit is same or not, if transaction is open in edit mode
2. Changed itemchange sql for site_code,owner_site_code and shipping site_code

git-svn-id: http://15.206.35.175/svn/proteus/business-java/trunk@181660 ce508802-f39f-4f6c-b175-0d175dae99d5