qemu misc save/load fixes

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

Changes since v3:
Patch to add missing braces reported by Blue Swirl Fix load for image saved with msi disabled
Changes since v2:
Restore used msi-x vectors
Changes since v1:
Don't restore virtio control vector twice

Michael S. Tsirkin (5):
qemu/msi: fix segfault in msix_save
qemu/virtio: remove control vector save
qemu/msi: clean used vectors state on load
qemu/msi: missing braces
qemu/virtio: mark msi vectors used on load

 hw/msix.c       |   15 +++++++++------
 hw/virtio-pci.c |   13 ++++++++++---
 hw/virtio.c     |    3 ---
 3 files changed, 19 insertions(+), 12 deletions(-)