camera: Use the node setter to set the lookat rotation
camera: Use the node setter to set the lookat rotation

We need to use the setter to plug into the code that will invalidate the
cached transform. Otherwise, the camera transform isn't valid :/

Signed-off-by: Damien Lespiau <64bd3cb94f359c1a3ce68dae5e26b40578526277@gmail.com>

dlespiau/dax,dlespiau/dax