Merge remote-tracking branch 'remotes/kraxel/tags/pull-vnc-20140725-1' into staging

Merge remote-tracking branch 'remotes/kraxel/tags/pull-vnc-20140725-1' into staging

vnc: fix two vnc update issues.

# gpg: Signature made Fri 25 Jul 2014 08:44:23 BST using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/kraxel/tags/pull-vnc-20140725-1:
  vnc update fix
  fix full frame updates for VNC clients

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>