Use qemu_del_nic() instead of qemu_del_net_client() to correctly free
the entire NICState.
Cc: qemu-stable@nongnu.org
Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit 3ffee3cd5f)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>