phpstan fixes

phpstan-bootstrap.php

@@ -10,5 +10,6 @@ $_SERVER['HTTP_HOST'] = 'soba.tokyo.tequila.jp';
 define('BASE_NAME', '');
 define('SITE_DOMAIN', '');
 define('HOST_NAME', 'soba.tokyo.tequila.jp');
+define('DEFAULT_ENCODING', 'en_US.UTF-8');
 
 // __END__

www/lib/CoreLibs/Language/GetLocale.php

@@ -96,7 +96,7 @@ class GetLocale
 				$encoding = defined('SITE_ENCODING') && !empty(SITE_ENCODING) ?
 					SITE_ENCODING :
 					// or default encoding, if not 'UTF-8'
-					(defined('DEFAULT_ENCODING') && !empty(DEFAULT_ENCODING) ?
+					(defined('DEFAULT_ENCODING') ?
 						DEFAULT_ENCODING : 'UTF-8');
 			}
 		}