ErrorAction to autodiscoverable file.

lib/clienterroraction.php

@@ -28,11 +28,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-if (!defined('STATUSNET') && !defined('LACONICA')) {
-    exit(1);
-}
-
-require_once INSTALLDIR . '/lib/error.php';
+if (!defined('GNUSOCIAL')) { exit(1); }
 
 /**
  * Class for displaying HTTP client errors