Import škol: Bugfix #2

bin/init-schools

@@ -228,7 +228,7 @@ def get_old_schools() -> DefaultDict[str, List[ProtoSchool]]:
 
     old_schools: DefaultDict[str, List[ProtoSchool]] = defaultdict(list)
     for s in schools:
-        if s.red_izo is None:
+        if not s.red_izo:
             print(f'TODO: Škola #{s.place_id} ({s.place.name}) nemá RED IZO')
             continue
         town = s.place.parent_place