Check against python None type when filling in auth parameters

When deciding whether to provide an auth function callback
in openAuth(), credcb was checked against NULL, when it
really needs to be checked against Py_None

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/libvirt-override.c b/libvirt-override.c
index 768144a..bb1d881 100644
--- a/libvirt-override.c
+++ b/libvirt-override.c
@@ -1840,7 +1840,8 @@ libvirt_virConnectOpenAuth(PyObject *self ATTRIBUTE_UNUSED, PyObject *args) {
             auth.credtype[i] = (int)PyLong_AsLong(val);
         }
     }
-    auth.cb = pycredcb ? virConnectCredCallbackWrapper : NULL;
+    if (pycredcb && pycredcb != Py_None)
+        auth.cb = virConnectCredCallbackWrapper;
     auth.cbdata = pyauth;
 
     LIBVIRT_BEGIN_ALLOW_THREADS;