[xml] Re: Possible bug in the Python bindings for libxml2

[Raymond Wiker <Raymond Wiker fast no>]

Raymond Wiker writes:
>         The reason for this failure is that xmlDoc.docSetRootElement()
> has an explicit check for a NULL return value from
> xmlDocSetRootElement(). AFAICT, NULL should be returned when the
> document does not already have any elements.

        Adding xmlDocSetRootElement to the map functions_noexcept in
python/generator.py seems to do the trick:

functions_noexcept = {
    "xmlHasProp": 1,
    "xmlHasNsProp": 1,
    "xmlDocSetRootElement": 1,
}