[xml] CDATA sections do not count line numbers via SAX2 API

[Dave Beckett <dave beckett bristol ac uk>]

This is seen with 2.6.3 and CVS head.

Attached is a program cdata_bug.c that uses the SAX2 API to parse a
file and two files a.xml (with a CDATA section) and b.xml (without).

Both files contain a bad entity on line 8, but only the b.xml
line counting is correct.

Compiling against current libxml2 CVS head:

$ xml2-config --version
2.6.3
$ gcc -Wall -g `xml2-config --cflags` cdata_bug.c `xml2-config --libs` -o cdata_bug
$ ./cdata_bug a.xml
line 6 column 25 error - xmlParseEntityRef: expecting ';'
$ ./cdata_bug b.xml
line 8 column 25 error - xmlParseEntityRef: expecting ';'

This also fails with other SAX APIs such as in 2.5.x, 2.4.x - I tried
the last two of these series.

I had an attempt at tracing this down inside libxml2 sources but
failed :(

Dave

Attachment: a.xml
Description: Text Data

Attachment: b.xml
Description: Text Data

Attachment: cdata_bug.c
Description: Binary data