Check if the itemView is defined before adding it.
Check if the itemView is defined before adding it.

git-svn-id: 9512a22ec92b52636bbab2193a3e38f5e8e93632@26569 280ce282-5f28-0410-b095-e054cb237d46

Eloqua/sproutcore,Eloqua/sproutcore,Eloqua/sproutcore