Fix bug in epub navigation.

resources/php-epub-meta/epub.php

@@ -218,7 +218,7 @@ class EPub {
     private function getNavPointDetail ($node) {
         $title = $this->toc_xpath->query('x:navLabel/x:text', $node)->item(0)->nodeValue;
         $src = $this->toc_xpath->query('x:content', $node)->item(0)->attr('src');
-        $src = $this->decodeComponentName ($src);
+        $src = $this->encodeComponentName ($src);
         return array("title" => $title, "src" => $src);
     }