websocket_demo: Remove a redundant line in do_bind()
websocket_demo: Remove a redundant line in do_bind()

No need to set hints.ai_protocol to 0 as we've already set all the
members of the structure to 0 with an earlier memset.

Signed-off-by: Andrew Clayton <02e0a999c50b1f88df7a8f5a04e1b76b35ea6a88@digital-domain.net>

ac000/websocket_demo,ac000/websocket_demo