WaE: ‘nLocalAttachedAxis’ may be used uninitialized in this function

Change-Id: I74f4c4507bbe6abe7618ca41764715b3b5c68b5b
(cherry picked from commit 20d8267a)
Signed-off-by: Stephan Bergmann <sbergman@redhat.com>

oox/source/export/chartexport.cxx

@@ -2050,7 +2050,7 @@ void ChartExport::exportSeries( Reference<chart2::XChartType> xChartType,
                     Reference<XPropertySet> xPropSet(xDataSeries, UNO_QUERY_THROW);
                     if( GetProperty( xPropSet, "AttachedAxisIndex") )
                     {
-                        sal_Int32 nLocalAttachedAxis;
+                        sal_Int32 nLocalAttachedAxis = 0;
                         mAny >>= nLocalAttachedAxis;
                         rAttachedAxis = translateFromChart2AxisIndexToOox(nLocalAttachedAxis);
                     }