tdf#159678: Fix heading dropdown list

Change-Id: I65b6e6e5484f26b27e7851a6615550f527fcfb06
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/163416
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
diff --git a/sw/source/ui/fldui/flddok.cxx b/sw/source/ui/fldui/flddok.cxx
index 1a2857b..5cb38a3 100644
--- a/sw/source/ui/fldui/flddok.cxx
+++ b/sw/source/ui/fldui/flddok.cxx
@@ -601,7 +601,7 @@ bool SwFieldDokPage::FillItemSet(SfxItemSet* )
        }

        case SwFieldTypesEnum::Chapter:
            aVal = OUString::number(m_xLevelED->get_active());
            aVal = m_xLevelED->get_active_text();
            break;

        default: