cid#1557397 COPY_INSTEAD_OF_MOVE

Change-Id: I9c33fe01e6f48b61df4130b548d9a6c793aa7e85
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/169979
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>

sw/source/uibase/dbui/dbmgr.cxx

@@ -1164,7 +1164,7 @@ bool SwDBManager::MergeMailFiles(SwWrtShell* pSourceShell,
                 pFilterContainer->GetFilter4FilterName( rMergeDescriptor.sSaveToFilter );
         if(pFilter)
         {
-            pStoreToFilter = pFilter;
+            pStoreToFilter = std::move(pFilter);
             if(!rMergeDescriptor.sSaveToFilterOptions.isEmpty())
                 pStoreToFilterOptions = &rMergeDescriptor.sSaveToFilterOptions;
         }