Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20140204-1' into...

Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20140204-1' into staging

migration/next for 20140204

# gpg: Signature made Tue 04 Feb 2014 15:52:00 GMT using RSA key ID 5872D723
# gpg: Can't check signature: public key not found

* remotes/juanquintela/tags/migration/20140204-1:
  Don't abort on memory allocation error
  Don't abort on out of memory when creating page cache
  XBZRLE cache size should not be larger than guest memory size
  migration:fix free XBZRLE decoded_buf wrong
  Add check for cache size smaller than page size
  Set xbzrle buffers to NULL after freeing them to avoid double free errors
  exec: fix ram_list dirty map optimization
  vmstate: Make VMSTATE_STRUCT_POINTER take type, not ptr-to-type

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