Fix waiting for daemonset when before and after patching desired number of scheduled pods is 0

Author: azaleski9

changelogs/fragments/756-fix-daemonset-waiting.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+  - waiter - Fix waiting for daemonset when desired number of pods is 0. (https://github.com/ansible-collections/kubernetes.core/pull/756).

plugins/module_utils/k8s/waiter.py

@@ -51,7 +51,7 @@ def daemonset_ready(daemonset: ResourceInstance) -> bool:
     return bool(
         daemonset.status
         and daemonset.status.desiredNumberScheduled is not None
-        and daemonset.status.updatedNumberScheduled
+        and (daemonset.status.updatedNumberScheduled or 0)
         == daemonset.status.desiredNumberScheduled
         and daemonset.status.numberReady == daemonset.status.desiredNumberScheduled
         and daemonset.status.observedGeneration == daemonset.metadata.generation