elm genlist: Added show_item check routine. Patch by Hyoyoung Chang <

elm genlist: Added show_item check routine. Patch by Hyoyoung Chang <
hyoyoung@gmail.com>. I committed his patch except for _calc_job diff.

On Wed, Mar 14, 2012 at 3:09 PM, Hyoyoung Chang <hyoyoung@gmail.com>
wrote:
> Dear all.
>
> This patch include two changes
>
> 1. at _scroll_item, added to check show_item is null or not.
> 2. at _calc_job, added to check genlist type
>   because calc_job is added anytime, but some genlist clearing is can
> be done before doing calc_job.
>
> Thanks.

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/elementary@69349 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33