tdf#100002 MM: directly try filename from column

If we generate multiple files via mail merge with the same name,
we append a number to any file, so the "basename" filename won't
actually be generated.

But if we get the filename from a database column, the user
expects to try the original file name before trying a name with
an appended number.

Change-Id: I68411901ed90d8e9a21423de9233a5be4f41eb12

sw/source/uibase/dbui/dbmgr.cxx

@@ -1322,7 +1322,7 @@ bool SwDBManager::MergeMailFiles(SwWrtShell* pSourceShell,
             aEntry.removeSegment();
             sPath = aEntry.GetMainURL( INetURLObject::NO_DECODE );
             OUString sExt(comphelper::string::stripStart(pStoreToFilter->GetDefaultExtension(), '*'));
-            aTempFile.reset( new utl::TempFile(sLeading, true, &sExt, &sPath) );
+            aTempFile.reset( new utl::TempFile(sLeading, sColumnData.isEmpty(), &sExt, &sPath) );
             if( !aTempFile->IsValid() )
             {
                 ErrorHandler::HandleError( ERRCODE_IO_NOTSUPPORTED );