Merge remote-tracking branch 'remotes/ehabkost/tags/machine-pull-request' into staging
cpu: crash fix (don't allow negative core id)
# gpg: Signature made Thu 03 Aug 2017 18:57:41 BST
# gpg: using RSA key 0x2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF D1AA 2807 936F 984D C5A6
* remotes/ehabkost/tags/machine-pull-request:
cpu: don't allow negative core id
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>