shell: Don't leak weston_touch_move_grab structs
shell: Don't leak weston_touch_move_grab structs

Signed-off-by: Jonas Ådahl <67dcd8a17e758192e0cbb577ce1d62cc7da6cf49@gmail.com>

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