tdf#119305 Chart created from fully selected sheet only targets header row

regression from
    commit 3acc5a23
    tdf#69977 improve creation of large charts

Change-Id: I09d02447b0e4691e98a44222608a3dc5edc95b0b
Reviewed-on: https://gerrit.libreoffice.org/60318
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sc/source/core/data/table1.cxx

@@ -1123,8 +1123,10 @@ void ScTable::LimitChartArea( SCCOL& rStartCol, SCROW& rStartRow, SCCOL& rEndCol
 
     // Optimised loop for finding the bottom of the area, can be costly in large
     // spreadsheets.
+    SCROW lastDataPos = 0;
     for (SCCOL i=rStartCol; i<=rEndCol; i++)
-        rEndRow = std::min(rEndRow, aCol[i].GetLastDataPos());
+        lastDataPos = std::max(lastDataPos, aCol[i].GetLastDataPos());
+    rEndRow = std::min(rEndRow, lastDataPos);
 }
 
 SCCOL ScTable::FindNextVisibleCol( SCCOL nCol, bool bRight ) const