Fixed bug - where $_SESSION['insertarray'] already exists, does not go through creation process again. Bug was occurring where a survey was begun, then the window was closed. Then the survey opened again. Previously the insertarray field would double up on each of the fieldnames, causing an error when the survey was finally submitted.

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/trunk/unstable@237 b72ed6b6-b9f8-46b5-92b4-906544132732