Incorrect usage of `SteamNetworkingMessage_t::Release()`

[copyrat90]

https://github.com/nxrighthere/ValveSockets-CSharp/blob/abe9031a25b2f5d6d6e2530fbd908faade6eb896/ValveSockets.cs#L401-L408

Block above is an incorrect usage of SteamAPI_SteamNetworkingMessage_t_Release(self). You have to pass the unmanaged pointer to the SteamNetworkingMessage_t, not the freeing function pointer m_pfnRelease.

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What SteamNetworkingMessage_t::Release() on GameNetworkingSockets does:

inline void SteamNetworkingMessage_t::Release() { (*m_pfnRelease)( this ); }

It calls the m_pfnRelease function pointer to clean up itself with this pointer.

Unfortunately, you can't do the same thing on C# side, because you don't have an unmanaged pointer to self inside of NetworkingMessage. Steamworks.NET solves this by providing the static method that receives IntPtr parameter.

/// You MUST call this when you're done with the object,
/// to free up memory, etc.
/// This is a Steamworks.NET extension.
public static void Release(IntPtr pointer) {
    NativeMethods.SteamAPI_SteamNetworkingMessage_t_Release(pointer);
}