Fixed problem with cloning a zip container.

tests/Internal/CustomZip/ZipFileCustomWriter.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace PhpZip\Tests\Internal\CustomZip;
+
+use PhpZip\IO\ZipWriter;
+use PhpZip\ZipFile;
+
+/**
+ * Class ZipFileCustomWriter.
+ */
+class ZipFileCustomWriter extends ZipFile
+{
+    /**
+     * @return ZipWriter
+     */
+    protected function createZipWriter()
+    {
+        return new CustomZipWriter($this->zipContainer);
+    }
+}