MM: restore the non-saving wizard behaviour

The wizard didn't save the MM source document, even if it was modified.

Change-Id: I0c7fb6abd31934bab7a33d7a9c93222af3e35ee5
Reviewed-on: https://gerrit.libreoffice.org/10986Reviewed-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>
Tested-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>

sw/source/uibase/dbui/dbmgr.cxx

@@ -895,8 +895,9 @@ bool SwDBManager::MergeMailFiles(SwWrtShell* pSourceShell,
         // Try saving the source document
         SfxDispatcher* pSfxDispatcher = pSourceShell->GetView().GetViewFrame()->GetDispatcher();
         SwDocShell* pSourceDocSh = pSourceShell->GetView().GetDocShell();
-        pSfxDispatcher->Execute( pSourceDocSh->HasName() ? SID_SAVEDOC : SID_SAVEASDOC, SFX_CALLMODE_SYNCHRON|SFX_CALLMODE_RECORD);
-        if( !pSourceDocSh->IsModified() )
+        if( !bMergeOnly && pSourceDocSh->IsModified() )
+            pSfxDispatcher->Execute( pSourceDocSh->HasName() ? SID_SAVEDOC : SID_SAVEASDOC, SFX_CALLMODE_SYNCHRON|SFX_CALLMODE_RECORD);
+        if( bMergeOnly || !pSourceDocSh->IsModified() )
         {
             const SfxFilter* pStoreToFilter = SwIoSystem::GetFileFilter(
                 pSourceDocSh->GetMedium()->GetURLObject().GetMainURL( INetURLObject::NO_DECODE ), ::aEmptyOUStr );