Network/AbstractSocket: Update OnStateChange signal

Now it is called before the state changes really


Former-commit-id: 3eec47302a971d798e1a75415377243bd743ce3f

include/Nazara/Network/AbstractSocket.hpp

@@ -36,7 +36,7 @@ namespace Nz
 			unsigned int QueryAvailableBytes() const;
 
 			// Slots
-			NazaraSignal(OnStateChange, const AbstractSocket* /*socket*/, SocketState /*oldState*/, SocketState /*newState*/);
+			NazaraSignal(OnStateChange, const AbstractSocket* /*socket*/, SocketState /*newState*/);
 
 		protected:
 			AbstractSocket(SocketType type);