libs: window: wayland: cancel read at poll message
libs: window: wayland: cancel read at poll message

Always call wl_display_cancel_read() when an errno is set, but
different to EAGAIN or EINTR.

https://bugzilla.gnome.org/show_bug.cgi?id=780442

ceyusa/gstreamer-vaapi,GStreamer/gstreamer-vaapi,GStreamer/gstreamer-vaapi,ceyusa/gstreamer-vaapi