Small change to cope with the PHP GeoIP extension

The plugin does not work when the PHP GeoIP extension is installed. There is an error in geoip.inc. The solution is simple: only load the .inc file when the extension is not used. The extension is being used if the constant GEOIP_COUNTRY_EDITION is defined. Here’s an example:

if (!defined('GEOIP_COUNTRY_EDITION'))
{
	include_once('geoip.inc');
	$geoIp = geoip_open(realpath(dirname(__FILE__))
		.'/GeoIP.dat',GEOIP_STANDARD);
}

And also handle the call to get the country:

<td><strong>
	<?php echo defined('GEOIP_COUNTRY_EDITION')
		? geoip_country_name_by_name($stat->ip)
		: geoip_country_name_by_addr($geoIp, $stat->ip);
	?>
</strong></td>

Then the plugin works either way.

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