exposay: Test keyboard presence before using keyboard pointer
exposay: Test keyboard presence before using keyboard pointer

We shouldn't actually use the keyboard pointer unless we check that
a keyboard is present.

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

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