Fix for Default Value after Google Quota Error

When there is a profile quota error, the plugin shows default value. It is due to a faulty return around line 560 of the code. You can replace the code with the following lines to show last retrieved value from the Google Analytics.
============================

// disable this piece. first check if we have an old value. If we have, then use it.
//return $options['gapp_defaultval'];

// ========= fixed code =========
// If we have an old value let's put that instead of the default one in case of an error
$meta_value = get_post_meta($postID, '_gapp_post_views', true);

if ($meta_value !== false) {
	$default_value = $meta_value;
}

set_transient($gaTransName, $default_value, 60 * $options['gapp_cache']);
// ========= fixed code =========