Don't require Xlib to behave synchronously (#249)
Don't require Xlib to behave synchronously (#249)

Otherwise, after a recent libx11 commit, the app might exit with code 1 (see the comment inside the code).

Closes https://github.com/lxqt/lxqt-globalkeys/issues/247
lxde/lxqt-globalkeys,lxde/lxqt-globalkeys