tdf#111773 tdf#111780 Fix selection after merge cells in an Impress table

Change-Id: I800c4fb8c37c07fb771f4310b207e459119a8e60
Reviewed-on: https://gerrit.libreoffice.org/45451Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

svx/source/table/tablecontroller.cxx

@@ -2757,12 +2757,12 @@ IMPL_LINK_NOARG(SvxTableController, UpdateHdl, void*, void)
         CellPos aEnd( maCursorLastPos );
         checkCell(aStart);
         checkCell(aEnd);
-        if( aStart != maCursorFirstPos  || aEnd != maCursorLastPos )
+        if( aStart != maCursorFirstPos || aEnd != maCursorLastPos )
         {
             setSelectedCells( aStart, aEnd );
+            updateSelectionOverlay();
         }
     }
-    updateSelectionOverlay();
 }
 
 namespace