- Killed a warning.  Reported by ax.

includes/database.mysql.inc

@@ -5,7 +5,7 @@ function db_connect($url) {
   $url = parse_url($url);
 
   // Allow for non-standard MySQL port.
-  if ($url["port"]) {
+  if (isset($url["port"])) {
      $url["host"] = $url["host"] . ":" . $url["port"];
   }