FTBFS texlive with GCC16

Hi,
texlive doesn't build with GCC 16 on openSUSE Tumbleweed:

```

[ 425s] 
../../../../../../texk/dvisvgm/dvisvgm-src/libs/clipper/clipper.cpp: In 
member function ‘void ClipperLib::Clipper::SetZ(ClipperLib::IntPoint&, 
ClipperLib::TEdge&, ClipperLib::TEdge&)’: [ 425s] 
../../../../../../texk/dvisvgm/dvisvgm-src/libs/clipper/clipper.cpp:1973:12: 
error: ambiguous overload for ‘operator!=’ (operand types are 
‘ClipperLib::ZType’ and ‘int’) [ 425s] 1973 | if (pt.Z != 0 || !m_ZFill) 
return; [ 425s] | ~~~~ ^~ ~ [ 425s] | | | [ 425s] | | int [ 425s] | 
ClipperLib::ZType [ 425s] • there are 2 candidates [ 425s] 
../../../../../../texk/dvisvgm/dvisvgm-src/libs/clipper/clipper.cpp:1973:12: 
[ 425s] 1973 | if (pt.Z != 0 || !m_ZFill) return; [ 425s] | ~~~~~^~~~ [ 
425s] In file included from 
../../../../../../texk/dvisvgm/dvisvgm-src/libs/clipper/clipper.cpp:41: 
[ 425s] • candidate 1: ‘bool ClipperLib::ZType::operator==(const 
ClipperLib::ZType&) const’ (rewritten) [ 425s] 
../../../../../../texk/dvisvgm/dvisvgm-src/libs/clipper/clipper.hpp:96:14: 
[ 425s] 96 | bool operator == (const ZType &p) const {return minLabel() 
== p.minLabel() && maxLabel() == p.maxLabel();} [ 425s] | ^~~~~~~~ [ 
425s] • candidate 2: ‘operator!=(uint64_t {aka long unsigned int}, int)’ 
(built-in) [ 425s] 
../../../../../../texk/dvisvgm/dvisvgm-src/libs/clipper/clipper.cpp:1973:12: 
[ 425s] 1973 | if (pt.Z != 0 || !m_ZFill) return; [ 425s] | ~~~~~^~~~ [ 
425s] make[7]: *** [Makefile:432: clipper.o] Error 1 ```

This is probably the result of a missing include somewhere. GCC 16 is 
pre-release. If you don't want to deal with it yourself, I can test your 
patches for you.
Originally raised in openSUSE bugzilla: 
https://bugzilla.suse.com/show_bug.cgi?id=1262013
You can find the failing build and the full build log here: 
https://build.opensuse.org/package/show/home:rguenther:plgrnd/texlive


Best regards,

Josef