Fixed false trigger_error() after redirect.

Resolves #814.

src/bootstrap.php

@@ -77,7 +77,7 @@ if (!defined('PSM_INSTALL') || !PSM_INSTALL) {
 	if ($db->getDbHost() === null) {
 		// no config file has been loaded, redirect the user to the install
 		header('Location: install.php');
-		trigger_error("Could not load config file. Redirect to install failed, <a href=\"install.php\">click here</a>.", E_USER_ERROR);
+		die();
 	}
 	// config file has been loaded, check if we have a connection
 	if (!$db->status()) {
@@ -87,7 +87,7 @@ if (!defined('PSM_INSTALL') || !PSM_INSTALL) {
 	if (!psm_load_conf()) {
 		// unable to load from config table
 		header('Location: install.php');
-		trigger_error("Could not load config table. Redirect to install failed, <a href=\"install.php\">click here</a>.", E_USER_ERROR);
+		die();
 	}
 	// config load OK, make sure database version is up to date
 	$installer = new \psm\Util\Install\Installer($db);

src/psm/Module/Config/Controller/ConfigController.php

@@ -226,7 +226,7 @@ class ConfigController extends AbstractController {
 
 			if ($language_refresh) {
 				header('Location: '.psm_build_url(array('mod' => 'config'), true, false));
-				trigger_error("Redirect failed.", E_USER_ERROR);
+				die();
 			}
 
 			if (isset($_POST['general_submit'])) {

src/psm/Module/Server/Controller/UpdateController.php

@@ -46,7 +46,7 @@ class UpdateController extends AbstractController {
 		header('Location: '.psm_build_url(array(
 			'mod' => 'server_status'
 		), true, false));
-		trigger_error("Redirect failed.", E_USER_ERROR);
+		die();
 	}
 
 }

src/psm/Module/User/Controller/LoginController.php

@@ -56,7 +56,7 @@ class LoginController extends AbstractController {
 			if ($result) {
 				// success login, redirect
 				header('Location: '.psm_build_url($_SERVER['QUERY_STRING']));
-				trigger_error("Redirect failed.", E_USER_ERROR);
+				die();
 			} else {
 				$this->addMessage(psm_get_lang('login', 'error_login_incorrect'), 'error');
 			}