Method getAttributes of XML-DataContainer returns null, when no attribute is found

[hwalter67]

When executing the getAttributes method with an XPath filter and attribute name that does not exit within the XML-DataContainer, then null will be returned
e.g.:
String[] notations = ETranslation.NOTATION.getAttributes("Settings", "name");

The method should return an empty String-Array instead of null, to avoid NullPointerException