Currently, there's a path to use the ncpuinfo variable uninitialized,
which leads to a compiler warning:
qemu/qemu_driver.c: In function 'qemuDomainGetVcpusFlags':
qemu/qemu_driver.c:4573:9: error: 'ncpuinfo' may be used
uninitialized in this function [-Werror=maybe-uninitialized]
for (i = 0; i < ncpuinfo; i++) {
^