Merge remote-tracking branch 'remotes/spice/tags/pull-spice-20150921-1' into staging

spice: surface switch fast path requires same format too.

# gpg: Signature made Mon 21 Sep 2015 10:05:54 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/spice/tags/pull-spice-20150921-1:
  spice: surface switch fast path requires same format too.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

ui/spice-display.c

@@ -408,7 +408,8 @@ void qemu_spice_display_switch(SimpleSpiceDisplay *ssd,
 
     if (surface && ssd->surface &&
         surface_width(surface) == pixman_image_get_width(ssd->surface) &&
-        surface_height(surface) == pixman_image_get_height(ssd->surface)) {
+        surface_height(surface) == pixman_image_get_height(ssd->surface) &&
+        surface_format(surface) == pixman_image_get_format(ssd->surface)) {
         /* no-resize fast path: just swap backing store */
         dprint(1, "%s/%d: fast (%dx%d)\n", __func__, ssd->qxl.id,
                surface_width(surface), surface_height(surface));