shm: fix cosmetic gcc warnings
shm: fix cosmetic gcc warnings

Fix warning: 'static' is not at beginning of declaration

Signed-off-by: Pekka Paalanen <6c0263d81461c956d504307112a4ce25eaacc3d1@gmail.com>

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