Fix hudCache update semantics

pyfpdb/fpdb_import.py

@@ -449,6 +449,8 @@ class Importer:
                 # Call hudcache update if not in bulk import mode
                 # FIXME: Need to test for bulk import that isn't rebuilding the cache
                 if self.callHud:
+                    for hand in handlist:
+                        if hand is not None:
                             hand.updateHudCache(self.database)
                     self.database.commit()