Improve _add_member()

Author: bouwew

plugwise/common.py

@@ -235,8 +235,8 @@ def _get_groups(self) -> None:
 
     def _add_member(self, element: etree.Element, members: list[str]) -> None:
         """Check and add member to list."""
-        if element.attrib["id"] in self.gw_entities:
-            members.append(item.attrib["id"])
+        if (member_id := element.attrib["id"]) in self.gw_entities:
+            members.append(member_id)
 
     def _get_lock_state(
         self, xml: etree.Element, data: GwEntityData, stretch_v2: bool = False