thunderbird 128.4.0 build fail on -current

After the llvm19 import and today's thunderbird update, I ran into ..

In file included from 
/usr/ports/mail/thunderbird/work/thunderbird-128.4.0/comm/third_party/rnp/src/lib/crypto/cipher_botan.cpp:26:
In file included from /usr/include/c++/v1/sstream:317:
In file included from /usr/include/c++/v1/__ostream/basic_ostream.h:16:
In file included from /usr/include/c++/v1/__system_error/error_code.h:18:
In file included from 
/usr/include/c++/v1/__system_error/error_category.h:15:
/usr/include/c++/v1/string:820:42: error: implicit instantiation of 
undefined template 'std::char_traits<unsigned char>'
   820 |   static_assert(is_same<_CharT, typename 
traits_type::char_type>::value,
       |                                          ^
/usr/ports/mail/thunderbird/work/thunderbird-128.4.0/comm/third_party/rnp/src/lib/crypto/cipher_botan.cpp:83:65: 
note: in instantiation of template class 'std::basic_string<unsigned 
char>' requested here
    83 |     const char *cipher_string = id_str_pair::lookup(cipher_map, 
cipher, NULL);
       |                                                                 ^
/usr/include/c++/v1/__fwd/string.h:23:29: note: template is declared here
    23 | struct _LIBCPP_TEMPLATE_VIS char_traits;
       |                             ^
1 error generated.

  .. which appears to be similar to the issue with devel/poco and fixed 
in commit c55157301f317ab8166349340d4cc0765deaac12,

	Michael