qemu misc save/load fixes

Anthony, please commit the following patches that fix save/load issues with qemu.git

Changes since v2:
Restore used msi-x vectors
Changes since v1:
Don't restore virtio control vector twice

Michael S. Tsirkin (3):
qemu/msi: fix segfault in msix_save
qemu/virtio: remove control vector save
qemu/virtio: mark msi vectors used on load

 hw/msix.c       |   13 ++++++++-----
 hw/virtio-pci.c |    6 ++++--
 hw/virtio.c     |    3 ---
 3 files changed, 12 insertions(+), 10 deletions(-)