Define v4l2_buffer only if HAVE_V4L2
If V4L2 support is disabled, there is no v4l2 buffer option.
R
Romain Vimont committed
6ad46d70b8190a8f409cdd62870f51a6e24baa50
Parent: f46758d
If V4L2 support is disabled, there is no v4l2 buffer option.