Fix to bug #814553 - scissors on 2nd, 3rd etc ranking question not showing when returning to a group with more than one ranking question. Fixed by resetting $existing value ($existing = 0;)

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/trunk/unstable@695 b72ed6b6-b9f8-46b5-92b4-906544132732