function debugFinished(oElement) {
				if (bDebug) {
					Log.debug(getNestingLevel() + "Finished", "</" + oElement.nodeName + ">",
						sXMLPreprocessor);
				}
			}
Outputs a debug message "Finished" with the given nesting level; takes care not to
serialize XML in vain.

@param {Element} oElement
  any XML DOM element which is serialized to the details