Update src/AsyncWebSocket.cpp

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: mathieucarbou

src/AsyncWebSocket.cpp

@@ -515,6 +515,7 @@ void AsyncWebSocketClient::_onData(void *pbuf, size_t plen) {
       _pinfo.index = 0;
       _pinfo.final = (fdata[0] & 0x80) != 0;
       _pinfo.opcode = fdata[0] & 0x0F;
+      // _pinfo.masked is a boolean: 1 if the frame is masked, 0 otherwise. Do not use as a counter.
       _pinfo.masked = ((fdata[1] & 0x80) != 0) ? 1 : 0;
       _pinfo.len = fdata[1] & 0x7F;