45eeda6 display: make klass->close() optional

Authored and Committed by elmarco 5 years ago
    display: make klass->close() optional
    
    Spice and VTE display do not need to implement it.
    
    Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
    Acked-by: Victor Toso <victortoso@redhat.com>
    
        
file modified
+2 -3