domain: Fix None comparison

None should be compared with "is None" instead of "== None", as the
later would invoke a "__cmp__()" method.

Signed-off-by: Philipp Hahn <[email protected]>

Author: pmhahn

libvirt-override-virDomain.py

@@ -69,7 +69,7 @@ def fsThaw(self, mountpoints: List[str] = None, flags: int = 0) -> int:
     def getTime(self, flags: int = 0) -> int:
         """Extract information about guest time """
         ret = libvirtmod.virDomainGetTime(self._o, flags)
-        if ret == None:
+        if ret is None:
             raise libvirtError('virDomainGetTime() failed')
         return ret