! If the username is oversized when logging in, trim it back to the maximum it can be as per database schema.

Signed-off-by: Peter Spicer <sleeping@myperch.org>

Sources/LogInOut.php

@@ -208,6 +208,13 @@ function Login2()
 		return;
 	}
 
+	// And if it's too long, trim it back.
+	if ($smcFunc['strlen']($_POST['user']) > 80)
+	{
+		$_POST['user'] = $smcFunc['substr']($_POST['user'], 0, 79);
+		$context['default_username'] = preg_replace('~&#(\\d{1,7}|x[0-9a-fA-F]{1,6});~', '&#\\1;', $smcFunc['htmlspecialchars']($_POST['user']));
+	}
+
 	// Are we using any sort of integration to validate the login?
 	if (in_array('retry', call_integration_hook('integrate_validate_login', array($_POST['user'], isset($_POST['hash_passwrd']) && strlen($_POST['hash_passwrd']) == 40 ? $_POST['hash_passwrd'] : null, $modSettings['cookieTime'])), true))
 	{