vnc: send desktopresize event as reply to set encodings

In case the desktop did resize while the vnc connection setup was still
in progress the client isn't informed about it.  Send a desktop resize
event as soon as the client told us it can handle deskop resize via set
encodings message to make sure the client us up to date.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

vnc.c

@@ -1726,6 +1726,7 @@ static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings)
             break;
         }
     }
+    vnc_desktop_resize(vs);
     check_pointer_type_change(&vs->mouse_mode_notifier);
 }