basepath of FileApi should be set in constructor

Author: streamtw

src/FileApi.php

@@ -32,6 +32,8 @@ public function __construct($basepath = DIRECTORY_SEPARATOR, $visibility = 'publ
             $basepath = mb_substr($basepath, 1, null, 'utf8');
         }
 
+        $this->setBasePath($basepath);
+
         $this->visibility = $visibility;
     }