vnc: make sure to send pointer type change event on SetEncodings Commit 37c34d9d5d87ea9d51760310c8863b82cb8c055a introduced a regression when using relative mouse mode with a client that understands the PointerTypeChange pseudo-encoding. Reported-by: Marcelo Tosatti <mtosatti@redhat.com> Reported-by: Gerhard Wiesinger <lists@wiesinger.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>