protocol: Fix typo by removing a redundant 'a'
protocol: Fix typo by removing a redundant 'a'

Signed-off-by: Bryce Harrington <dd437fc32dcda8cbb48d47baa844ad777493d02b@samsung.com>

mchalupa/wayland,sir-murray/wayland,mchalupa/wayland,mchalupa/wayland,tulcod/wayland,bitfactor/wayland,sir-murray/wayland,eyolfson/wayland,sir-murray/wayland,bitfactor/wayland,abooij/wayland,eyolfson/wayland,abooij/wayland,bitfactor/wayland,tulcod/wayland,abooij/wayland,eyolfson/wayland,tulcod/wayland