libcamera: yaml_parser: Return nullopt on error from YamlObject::get()

The YamlParser::get<>() function returns an std::optional<> to indicate
when YAML parsing failed.

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

        return {};

This has been reported as generating compiler warnings with a gcc 9.3.0
arm64 cross-compiler:

../src/libcamera/yaml_parser.cpp:184:11: error: ‘<anonymous>’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  184 |   return {};
      |           ^

Replace this with an explicit

	return std::nullopt;

which fixes the warnings and conveys the purpose more explicitly.

Reported-by: Christian Rauch <Rauch.Christian@gmx.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

0 files changed, 0 insertions, 0 deletions