coverity#1438379 Uninitialized scalar field

Change-Id: Ic8614c2c455a5a49592ee5f8ef0c91bf4d729e1e
Reviewed-on: https://gerrit.libreoffice.org/58686
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sc/source/filter/xml/xmltransformationi.cxx

@@ -581,6 +581,7 @@ uno::Reference<xml::sax::XFastContextHandler>
 ScXMLDateTimeContext::ScXMLDateTimeContext(
     ScXMLImport& rImport, const rtl::Reference<sax_fastparser::FastAttributeList>& rAttrList)
     : ScXMLImportContext(rImport)
+    , maType(sc::DATETIME_TRANSFORMATION_TYPE::DATE_STRING)
 {
     if (rAttrList.is())
     {