(websocket server) fix regression from 8.1.2, where per-deflate message compression was always disabled

ixwebsocket/IXWebSocket.cpp

@@ -134,6 +134,13 @@ namespace ix
         _enablePong = false;
     }
 
+    void WebSocket::enablePerMessageDeflate()
+    {
+        std::lock_guard<std::mutex> lock(_configMutex);
+        WebSocketPerMessageDeflateOptions perMessageDeflateOptions(true);
+        _perMessageDeflateOptions = perMessageDeflateOptions;
+    }
+
     void WebSocket::disablePerMessageDeflate()
     {
         std::lock_guard<std::mutex> lock(_configMutex);

ixwebsocket/IXWebSocket.h

@@ -57,6 +57,7 @@ namespace ix
         void setPingTimeout(int pingTimeoutSecs);
         void enablePong();
         void disablePong();
+        void enablePerMessageDeflate();
         void disablePerMessageDeflate();
         void addSubProtocol(const std::string& subProtocol);
 

ixwebsocket/IXWebSocketServer.cpp

@@ -87,7 +87,11 @@ namespace ix
             webSocket->disablePong();
         }
 
-        if (!_enablePerMessageDeflate)
+        if (_enablePerMessageDeflate)
+        {
+            webSocket->enablePerMessageDeflate();
+        }
+        else
         {
             webSocket->disablePerMessageDeflate();
         }

ixwebsocket/IXWebSocketVersion.h

@@ -6,4 +6,4 @@
 
 #pragma once
 
-#define IX_WEBSOCKET_VERSION "8.1.3"
+#define IX_WEBSOCKET_VERSION "8.1.4"