input: Don't leak the initial keymap
input: Don't leak the initial keymap

weston_xkb_info_create() takes ownership of the xkb_keymap instance so
we should drop our reference or we would leak it later if the keymap
was changed.

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