An encoding bug introduced in the MarcStreamWriter constructor

[zliebsco]

Is this project still active? I hope it is, since it's a very useful library. I think the bug was introduced in the encoding change in the constructor of the MarcStreamWriter class.
This is the changed code
public MarcStreamWriter(Stream output, String encoding, bool allowOversizeRecord) : this(output,
Encoding.GetEncoding(encoding), allowOversizeRecord)

It throws exception when calling the constructor
public MarcStreamWriter(Stream output)

because the Encoding.GetEncoding(encoding) calls the GetEncoding without checking for null.