use cache even if SQL query result was empty

mod.php

@@ -320,13 +320,13 @@
 												sprintf($config['file_page'], $post['thread']) . '#' . $match[1]
 											: sprintf($config['file_page'], $match[1])) .
 										'">$0</a>', $log['text']);
+								}
 								
 								if($config['cache']['enabled'])
 									cache::set($log_id, $log['text']);
 							}
 						}
 					}
-					}
 					
 					$body .= '<tr>' .
 					'<td class="minimal">' .