input: Don't try to send axis_source when there are no resources
input: Don't try to send axis_source when there are no resources

The focus_client pointer may be NULL here if the focused client has no
pointer resources. To avoid a crash, NULL check focus client before
proceeding to send the events.

https://bugs.freedesktop.org/show_bug.cgi?id=94899

Signed-off-by: Jonas Ådahl <67dcd8a17e758192e0cbb577ce1d62cc7da6cf49@gmail.com>
Reviewed-by: Mike Blumenkrantz <e715aa9cd0d2fd73d2176468a9c32a1a3f4b153d@osg.samsung.com>

Gnurou/weston,krezovic/weston,sir-murray/weston,giucam/weston,giucam/weston,krezovic/weston,Gnurou/weston,sir-murray/weston