libcamera: file: Check files exist()

Ensure that when we check for existence with File() it will only return
if the path leads to a file, and not a directory.

Device nodes which could still be opened by this class are still
supported.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

0 files changed, 0 insertions, 0 deletions