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

sdl2 relative mouse mode fixes.

# gpg: Signature made Fri 11 Apr 2014 11:36:46 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-sdl-1:
  input: sdl2: Fix relative mode to match SDL1 behavior
  input: sdl2: Fix guest_cursor logic

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