Support xmlStructuredErrorFunc definition change in libxml2

[yahonda]

This pull request supports xmlStructuredErrorFunc definition change in libxml2 via https://gitlab.gnome.org/GNOME/libxml2/-/commit/61034116d0a3c8b295c6137956adc3ae55720711

Fix #213
Thank you for providing a way to fix https://bugs.freebsd.org/bugzilla/attachment.cgi?id=248824&action=diff

[yahonda]

I am unable to address the trailing ^M is removed when I edit this file via vim or Visual Studio Code on my macOS. Copy and paste the git diff does not show the diff color in red correctly, let me upload the screenshot.

[cfis]

I am confused. The header files shows the constant is needed:

https://gitlab.gnome.org/GNOME/libxml2/-/blob/master/include/libxml/xmlerror.h?ref_type=heads#L865

typedef void (*xmlStructuredErrorFunc) (void *userData, const xmlError *error);

The commit you pointed to previously shows the const being added.

https://gitlab.gnome.org/GNOME/libxml2/-/commit/61034116d0a3c8b295c6137956adc3ae55720711

And compiling with libxml 2.12.5-1 works fine with gcc and msvc.

What am I missing?

[cfis]

Ok, this is the issue:

1476a2d

That fix is needed for new versions of libxml but breaks old versions. I should have added a version check there.

[cfis]

Ok, fixed in c7933a7.

Sorry not to realize this error sooner - but thanks for reporting!

[yahonda]

Thank you for the fix.