sfTcpListener_accept now returns a null pointer when it fails

include/SFML/Network/TcpListener.h

@@ -112,6 +112,10 @@ CSFML_NETWORK_API sfSocketStatus sfTcpListener_listen(sfTcpListener* listener, u
 /// If the socket is in blocking mode, this function will
 /// not return until a connection is actually received.
 ///
+/// The \a connected argument points to a valid sfTcpSocket pointer
+/// in case of success (the function returns sfSocketDone), it points
+/// to a NULL pointer otherwise.
+///
 /// \param listener  TCP listener object
 /// \param connected Socket that will hold the new connection
 ///

src/SFML/Network/TcpListener.cpp

@@ -82,5 +82,13 @@ sfSocketStatus sfTcpListener_accept(sfTcpListener* listener, sfTcpSocket** conne
     CSFML_CHECK_RETURN(connected, sfSocketError);
 
     *connected = new sfTcpSocket;
-    return static_cast<sfSocketStatus>(listener->This.accept((*connected)->This));
+    sfSocketStatus status = static_cast<sfSocketStatus>(listener->This.accept((*connected)->This));
+
+    if (status != sfSocketDone)
+    {
+        delete *connected;
+        *connected = NULL;
+    }
+
+    return status;
 }