loplugin:ostr in oox

Change-Id: I08124ce2da1facbe2e84aa4a7a8e25fec24fa962
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/167428
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/oox/source/drawingml/chart/datasourceconverter.cxx b/oox/source/drawingml/chart/datasourceconverter.cxx
index c07ea397d537..4598572b4723 100644
--- a/oox/source/drawingml/chart/datasourceconverter.cxx
+++ b/oox/source/drawingml/chart/datasourceconverter.cxx
@@ -73,7 +73,7 @@ Reference< XDataSequence > DataSequenceConverter::createDataSequence( const OUSt
 
     bool bDateCategories = (mrModel.meFormatType == SvNumFormatType::DATE) && (rRole == "categories");
     xDataSeq = getChartConverter().createDataSequence(getChartDocument()->getDataProvider(), mrModel,
-        rRole, bDateCategories ? OUString("date") : OUString(""));
+        rRole, bDateCategories ? u"date"_ustr : u""_ustr);
 
     // set sequence role
     PropertySet aSeqProp( xDataSeq );