flags cannot get right value for blockCopy function
flags cannot get right value for blockCopy function

When use blockCopy, flags cannot get a right value, because
PyArg_ParseTuple want to get 6 parameters and blockCopy only
pass 5. Flags will get a unpredictable value, this will make
the function fail with error:

unsupported flags (0x7f6c) in function qemuDomainBlockCopy

Signed-off-by: Luyao Huang <23d9981432efa88691fd2a71f5525bc2174f7664@redhat.com>

libvirt/libvirt-python,libvirt/libvirt-python,libvirt/libvirt-python