tdf#108027, add external ref string items to the data array

Change-Id: Iaf607fca6d7e88f2c529ab4a374f34164813331a
Reviewed-on: https://gerrit.libreoffice.org/64009
Tested-by: Jenkins
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
diff --git a/sc/source/ui/unoobj/chart2uno.cxx b/sc/source/ui/unoobj/chart2uno.cxx
index 233b0fe..4486523 100644
--- a/sc/source/ui/unoobj/chart2uno.cxx
+++ b/sc/source/ui/unoobj/chart2uno.cxx
@@ -2637,7 +2637,7 @@ sal_Int32 ScChart2DataSequence::FillCacheFromExternalRef(const ScTokenRef& pToke
                    aItem.mbIsValue = false;
                    aItem.maString = pMat->GetString(nC, nR).getString();

                    m_aDataArray.emplace_back();
                    m_aDataArray.emplace_back(aItem);
                    ++nDataCount;
                }
            }