cam: options: fix access to uninit variable

operator[] doesn't check if the option exists in the values_ map, so it
can return a pointer to location outside the map.

Fix by returning an empty OptionValue if the option is not found.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@iki.fi>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
[Kieran: Adjust s_empty naming to 'empty']
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

0 files changed, 0 insertions, 0 deletions