Calculate struct_has_fabric_sensitive_fields only at the top level, n…

…ot transitively

src-electron/generator/helper-zcl.js

@@ -173,7 +173,7 @@ async function zcl_structs(options) {
         await Promise.all(promises)
       }
     }
-    for (const i of items) {
+    for (const i of st.items) {
       if (i.isFabricSensitive) {
         st.struct_has_fabric_sensitive_fields = true
       }