Fix IXWebSocketMessage.h:35:15: warning: ‘webSocketMessageType’ may b…

[flagarde]

Fix a warning :

In file included from /home/rpclab/CLionProjects/YAODAQ/build/_deps/ixwebsocket-src/ixwebsocket/IXWebSocket.h:17,
                 from /home/rpclab/CLionProjects/YAODAQ/build/_deps/ixwebsocket-src/ixwebsocket/IXWebSocket.cpp:7:
/home/rpclab/CLionProjects/YAODAQ/build/_deps/ixwebsocket-src/ixwebsocket/IXWebSocketMessage.h: In function ‘ix::WebSocket::run()::<lambda(const string&, size_t, bool, ix::WebSocketTransport::MessageKind)>’:
/home/rpclab/CLionProjects/YAODAQ/build/_deps/ixwebsocket-src/ixwebsocket/IXWebSocketMessage.h:35:15: warning: ‘webSocketMessageType’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   35 |             : type(t)
      |               ^~~~~~~
/home/rpclab/CLionProjects/YAODAQ/build/_deps/ixwebsocket-src/ixwebsocket/IXWebSocket.cpp:388:42: note: ‘webSocketMessageType’ was declared here
  388 |                     WebSocketMessageType webSocketMessageType;
      |                                          ^~~~~~~~~~~~~~~~~~~~

[bsergean]

All cases are covered in the switch (messageKind) so this should not be a problem, but warnings are annoying.