[ticket/13904] No longer use fileerror class for extending filespec class

PHPBB3-13904

phpBB/phpbb/files/filespec.php

@@ -118,6 +118,20 @@ class filespec
 		return !isset($this->filename);
 	}
 
+	/**
+	 * Set error in error array
+	 *
+	 * @param mixed $error Content for error array
+	 *
+	 * @return \phpbb\files\filespec This instance of the filespec class
+	 */
+	public function set_error($error)
+	{
+		$this->error[] = $error;
+
+		return $this;
+	}
+
 	/**
 	 * Cleans destination filename
 	 *