p5-XML/LibXML - build failed

[Gardner Bell]

With a new install of 8.3-STABLE and a fresh ports tree p5-XML-LibXML
failed to build with the following error:

torrus-2.01_2 depends on package: rrdtool
torrus-2.01_2 depends on package: p5-XML-LibXML>=0 - not found
Verifying install for p5-XML-LibXML>=0 in /usr/ports/textproc/p5-XML-LibXML

Building for p5-XML-LibXML-1.91,1
cc -c -I/usr/local/include/libxml2 -I/usr/local/include -02 -pipe
-march=prescott -fno-strict-aliasing -02 -pipe -march=prescott
-fno-strict-aliasing -DVERSION=\"1.97\" -DXS_VERSION=\"1.97\" -DPIC
-fPIC "-I/usr/local/lib/perl5/5.16.0/mach/CORE -DHAVE_UTF8
-DHAVE_BLANK LibXML.c
LibXML.c: In function 'XS_XML__LibXML__RelaxNG_DESTROY':
LibXML.c:11460: error: 'xmlRelaxNGPtr' undeclared (first use in this function)
LibXML.c:11460: error (Each undeclared identifier is reported only
once for each function it appears in)
LibXML.c:11460: error: expected ';' before 'self'
LibXML.c:11463: error: 'self' undeclared (first use in this function)
LibXML.c:11463: error: expected expression before 'unsigned'
*** Error code 1