fix warning: ignore last part for rewriting when uneven count #12
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ezzoom was generating many warnings like the following
[Fri Dec 14 09:59:12 2012] [warn] [client 66.249.76.102] mod_fcgid: stderr: PHP Notice: Undefined offset: 13 in /var/www/magento/htdocs/ezzoom.php on line 138
that happens because ezzoom adds '/ZOOM_INDEX' to the uri before splitting.
the fix will just ignore the last component. in my (limited) testing, it has always been 'ZOOM_INDEX'.