It's unnecessary to call if a replacement was already done and might
even harm, though unlikely. (e.g. file extension "web")

Change-Id: I6615c9a31178770429b523e0ee878661f1b2b6e8
Reviewed-on: https://gerrit.libreoffice.org/42667Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>