Core/NetworkIO: Fix memory leak

Packet headers not being correctly deallocated.

src/server/game/Server/WorldSocket.cpp

@@ -512,6 +512,7 @@ int WorldSocket::handle_input_payload (void)
 
     m_RecvPct.base (NULL, 0);
     m_RecvPct.reset();
+    delete m_RecvWPct;
     m_RecvWPct = NULL;
 
     m_Header.reset();