Skip only the invalid parking lots, not the entire set (#440)

The ParkenDD Zürich feed has a few entries without geo coordinates for
example, but is otherwise valid.

modules/parking/src/parkendd.cc

@@ -49,7 +49,17 @@ std::vector<api_parking_lot> parse(std::string const& json) {
 
  utl::verify(doc.IsObject(), "no root object");
  auto const& lots = get_array(doc, "lots");
- return utl::to_vec(lots, [](auto const& lot) { return parse_lot(lot); });
+
+ std::vector<api_parking_lot> result;
+ result.reserve(lots.Size());
+ for (auto const& lot : lots) {
+ try {
+ result.push_back(parse_lot(lot));
+ } catch (...) {
+ continue;
+ }
+ }
+ return result;
 }
 
 parking_lot to_parking_lot(api_parking_lot const& apl) {