[xml] Patch: Null prefix namespaces not cloned

[Andrew Miller <ak miller auckland ac nz>]

Hi,

libxml2 currently does not handle namespaces correctly in all cases when cloning
nodes.

I have attached a testcase(which demonstrates the bug using libgdome2.0.8.1 on
top of libxml2.2.6.23), and a patch for the issue.

The testcase tests 4 different cases, which you access by compiling with
-DTESTNUMBER=0 through to -DTESTNUMBER=3

Please CC any responses to me, as I am not on the xml@ list.

Best regards,
Andrew Miller


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