libcamera: yaml_parser: Return nullopt on error

The YamlParser::getList<>() function returns an std::optional<> to allow
callers to identify cases where parsing the .yaml file failed from cases
where the parsed list is just empty.

The current implementation returns a default constructed std::optional
in case of errors with

	return {};

The returned value is thus equal to std::nullopt, but the code can be
easily misinterpreted as returning an empty vector by a reader.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

0 files changed, 0 insertions, 0 deletions