fe33e727f2
`PixelFormatInfo::planes.size()` always returns 3 since `planes` is an array, but that is not the number of planes of the pixel format. Use the `numPlanes()` getter instead. Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>