Partially revert "xwayland: Always free reply from xcb_get_property_reply()"
Partially revert "xwayland: Always free reply from xcb_get_property_reply()"

This reverts commit d3553c721c0fed07f85b70fea418ca65ed974fbb.

weston_wm_write_property() takes the ownership of the reply it gets as
a parameter, and will eventually free it later in writable_callback.

This change introduced a double-free when Xwayland programs triggered a
copy to the clipboard, leading to a Weston crash.

Reviewed-By: Derek Foreman <2f97e0f0bc172406aab8ccd42dab54c95bab8759@osg.samsung.com>
Reviewed-by: Bryce Harrington <bdb14cfc1ab8d24e13de84adc40b41ae60c13bd1@osg.samsung.com>

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