Silence __spice_char_device_write_buffer_get: internal buf is not available
Silence __spice_char_device_write_buffer_get: internal buf is not available

These messages are printed when the server tries to push a mouse event to
the agent before the previous one has been flushed. This is a normal condition
(which gets tracked by the reds->pending_mouse_event boolean), and as such
it should *not* trigger the printing of error messages.

I've seen these messages occasionally before, but with agent file-xfer they
are trivial to trigger, simply send a large file to the agent and while it
is transferring move the mouse over the client window. Note that due to the
client tokens not allowing the client to completely saturate the agent
channel mouse events do still get send to the agent, just with a slightly
larger interval. So everything is working as designed and this spice_printerr
is just leading to people chasing ghosts.

Signed-off-by: Hans de Goede <9fa1be1a5b5729e4c6b404f34c9ce49ff4882fd8@redhat.com>

fgouget/spice,Fantu/spice,ya-mouse/spice,alon/spice-server,alon/spice-server,SPICE/spice,Fantu/spice,alon/spice-server,Fantu/spice,elmarco/spice,elmarco/spice,ya-mouse/spice,ya-mouse/spice,freedesktop-unofficial-mirror/spice__spice,alon/spice-server,elmarco/spice,elmarco/spice,SPICE/spice,alon/spice-server,freedesktop-unofficial-mirror/spice__spice,freedesktop-unofficial-mirror/spice__spice,freedesktop-unofficial-mirror/spice__spice,fgouget/spice,fgouget/spice,freedesktop-unofficial-mirror/spice__spice,fgouget/spice,SPICE/spice,elmarco/spice,Fantu/spice