Hide brown base on flat rides if "no platform" station style is selected

src/openrct2/object/StationObject.cpp

@@ -94,6 +94,7 @@ void StationObject::ReadJson(IReadObjectContext* context, json_t& root)
                 { "hasPrimaryColour", STATION_OBJECT_FLAGS::HAS_PRIMARY_COLOUR },
                 { "hasSecondaryColour", STATION_OBJECT_FLAGS::HAS_SECONDARY_COLOUR },
                 { "isTransparent", STATION_OBJECT_FLAGS::IS_TRANSPARENT },
+                { "noPlatforms", STATION_OBJECT_FLAGS::NO_PLATFORMS },
             });
     }