Fix. Ensure masked value fit to byte.
Fix. Ensure masked value fit to byte.

enginix/lua-websockets,OptimusLime/lua-websockets,OptimusLime/lua-websockets,KSDaemon/lua-websockets,enginix/lua-websockets,lipp/lua-websockets,KSDaemon/lua-websockets,enginix/lua-websockets,KSDaemon/lua-websockets,OptimusLime/lua-websockets,lipp/lua-websockets,lipp/lua-websockets