Incorrect default language for COMM ID3v2 frame

[Stephen F. Booth]

Hello list,

I came across a strange problem and tracked it down to handling of  
language-specific comment frames.  The ID3v2.4.0 spec says, with  
regards to language codes in text frames:

The three byte language field, present in several frames, is used to
describe the language of the frame's content, according to ISO-639-2
[ISO-639-2]. The language should be represented in lower case. If the
language is not known the string "XXX" should be used.

So I'm submitting the following patch:

Index: commentsframe.cpp
===================================================================
--- commentsframe.cpp	(revision 764613)
+++ commentsframe.cpp	(working copy)
@@ -154,7 +154,7 @@
ByteVector v;

v.append(char(d->textEncoding));
-  v.append(d->language.size() == 3 ? d->language : "   ");
+  v.append(d->language.size() == 3 ? d->language : "XXX");
v.append(d->description.data(d->textEncoding));
v.append(textDelimiter(d->textEncoding));
v.append(d->text.data(d->textEncoding));

Stephen