elementary/map

elementary/map

Dear all,

I have found a bug that calculation fails when view port size is
bigger than map size.
For example, if map size is 256x256 but view port size is 798x798
(when zoom level is a 1), center longitude & latitude is out bound
from normal longitude & latitude.
I have fixed it.
Please review this patch.

Signed-Off-By: Bluezery <ohpowel@gmaill.com>
Signed-Off-By: ChunEon Park <hermet@hermet.pe.kr>
git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/elementary@66526 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33