fix guest_size metadata for migration (#93)
fix guest_size metadata for migration (#93)

If the guest exceeds KVM_32BIT_GAP_START we have to remove the
KVM_32BIT_GAP_SIZE from the guest_size since this is re-calculated at
the destination.
RWTH-OS/HermitCore,RWTH-OS/HermitCore,RWTH-OS/HermitCore,RWTH-OS/HermitCore,RWTH-OS/HermitCore,RWTH-OS/HermitCore