message: bugfix: escape object name in chart xml
diff: @@ -1412,7 +1412,7 @@ function makeChartType(chartType: CHART_NAME, data: IOptsChartData[], opts: ICha
  strXml += ' <c:tx>'
  strXml += ' <c:strRef>'
  strXml += ' <c:f>Sheet1!$' + getExcelColName(idxColLtr + 1) + '$1</c:f>'
  - strXml += ' <c:strCache><c:ptCount val="1"/><c:pt idx="0"><c:v>' + obj.name + '</c:v></c:pt></c:strCache>'
  + strXml += ' <c:strCache><c:ptCount val="1"/><c:pt idx="0"><c:v>' + encodeXmlEntities(obj.name) + '</c:v></c:pt></c:strCache>'
  strXml += ' </c:strRef>'
  strXml += ' </c:tx>'
  