Merge branch 'hotfix/2777'

Close zendframework/zendframework#2777

src/AbstractFilter.php

@@ -41,7 +41,7 @@ public static function hasPcreUnicodeSupport()
         if (static::$hasPcreUnicodeSupport === null) {
             static::$hasPcreUnicodeSupport = false;
             ErrorHandler::start();
-            if (defined('PREG_BAD_UTF8_OFFSET_ERROR') || preg_match('/\pL/u', 'a') == 1) {
+            if (defined('PREG_BAD_UTF8_OFFSET_ERROR') && preg_match('/\pL/u', 'a') == 1) {
                 static::$hasPcreUnicodeSupport = true;
             }
             ErrorHandler::stop();