desktop-shell: Make surface_rotate take a pointer instead of a seat
desktop-shell: Make surface_rotate take a pointer instead of a seat

It doesn't actually need the seat and we have to validate that the seat
has a pointer before making the call, so it's safer just to pass
the validated pointer.

Reviewed-by: Jonas Ådahl <67dcd8a17e758192e0cbb577ce1d62cc7da6cf49@gmail.com>
Signed-off-by: Derek Foreman <2f97e0f0bc172406aab8ccd42dab54c95bab8759@osg.samsung.com>

kwm81/weston,Gnurou/weston,Tarnyko/weston-xdg_surface_present,giucam/weston,kwm81/weston,sir-murray/weston,eyolfson/weston,Tarnyko/weston-xdg_surface_present,Fantu/compositor-spice,Fantu/compositor-spice,eyolfson/weston,Gnurou/weston,sir-murray/weston,krezovic/weston,giucam/weston,jonnylamb/weston,jonnylamb/weston,xorgy/weston,krezovic/weston,udoprog/weston,xorgy/weston,udoprog/weston,Fantu/compositor-spice