Fix Proxmox node, name condition. (#5108) (#5110)

* Fix Proxmox `node`, `name` condition.

* Add changelog entry.

(cherry picked from commit 0338eb7a7c)

Co-authored-by: Markus Reiter <me@reitermark.us>

changelogs/fragments/5108-proxmox-node-name-condition.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - proxmox_kvm - fix wrong condition (https://github.com/ansible-collections/community.general/pull/5108).

plugins/modules/cloud/misc/proxmox_kvm.py

@@ -1234,7 +1234,7 @@ def main():
                 module.exit_json(changed=False, vmid=vmid, msg="VM with vmid <%s> already exists" % vmid)
             elif proxmox.get_vmid(name, ignore_missing=True) and not (update or clone):
                 module.exit_json(changed=False, vmid=proxmox.get_vmid(name), msg="VM with name <%s> already exists" % name)
-            elif not (node, name):
+            elif (not node) or (not name):
                 module.fail_json(msg='node, name is mandatory for creating/updating vm')
             elif not proxmox.get_node(node):
                 module.fail_json(msg="node '%s' does not exist in cluster" % node)