Modifications to ensure that when editing a question you can't change its group to null. New function in common.php called getgrouplist3, modified html.php to use that function, added checking in common.php to ensure question isn't updated if new gid is null or "".

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/trunk/unstable@694 b72ed6b6-b9f8-46b5-92b4-906544132732