Assert that parameters are valid

Follow-up for 3a2a430a

Change-Id: I46a4f8a4528b73e4dcb01770af127ddea4000fdb
Reviewed-on: https://gerrit.libreoffice.org/48382Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

sc/source/core/data/column.cxx

@@ -1896,6 +1896,8 @@ void ScColumn::UpdateNoteCaptions( SCROW nRow1, SCROW nRow2 )
 
 void ScColumn::UpdateDrawObjects(std::vector<std::vector<SdrObject*>>& pObjects, SCROW nRowStart, SCROW nRowEnd)
 {
+    assert(static_cast<int>(pObjects.size()) >= nRowEnd - nRowStart + 1);
+
     int nObj = 0;
     for (SCROW nCurrentRow = nRowStart; nCurrentRow <= nRowEnd; nCurrentRow++, nObj++)
     {