Merge remote-tracking branch 'remotes/spice/tags/pull-spice-20150122-1' into staging

spice: fix coverity defect, add unix address support

# gpg: Signature made Thu 22 Jan 2015 11:17:24 GMT 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/spice/tags/pull-spice-20150122-1:
  spice: fix coverity reported defect in display code
  spice: add unix address support

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