spicevmc: Remove useless check
spicevmc: Remove useless check

rcc is already deferenced in red_channel_client_get_client so
checking for NULL after that is uselss.

Also this call is generated from red_channel_client_disconnect
which requires the rcc pointer to be valid.

Signed-off-by: Frediano Ziglio <55d48b080b2e443e395cde84d2c83b135a4ff48e@redhat.com>
Acked-by: Christophe Fergeau <05b95054a663c388a4e33d95828cb30f0370f8ef@redhat.com>

fgouget/spice,fgouget/spice,fgouget/spice,fgouget/spice