maintainer-feedback requested: [Bug 271245] www/rubygem-hpricot: fix build with clang 16

Bugzilla Automation <bugzilla@FreeBSD.org> has asked freebsd-ruby (Nobody)
<ruby@FreeBSD.org> for maintainer-feedback:
Bug 271245: www/rubygem-hpricot: fix build with clang 16
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271245



--- Description ---
Clang 16 has a new error about incompatible function types, which shows up when
building www/rubygem-hpricot:

  fast_xs.c:165:39: error: incompatible function pointer types passing 'VALUE
(VALUE)' (aka 'unsigned long (unsigned long)') to parameter of type 'VALUE
(*)(VALUE, VALUE)' (aka 'unsigned long (*)(unsigned long, unsigned long)')
[-Wincompatible-function-pointer-types]
	  array = rb_rescue(unpack_utf8, self, unpack_uchar, self);
					       ^~~~~~~~~~~~
  /usr/local/include/ruby-3.1/ruby/internal/iterator.h:364:62: note: passing
argument to parameter 'r_proc' here
  VALUE rb_rescue(VALUE (*b_proc)(VALUE), VALUE data1, VALUE (*r_proc)(VALUE,
VALUE), VALUE data2);
							       ^

This is because the r_proc parameter of rb_rescue() should be a pointer to a
function taking two VALUE parameters, not one (the second parameter can contain
an exception to be handled).

Another similar error occurs later in hpricot_scan.c, which was generated from
hpricot_scan.rl:

  hpricot_scan.rl:855:3: error: incompatible function pointer types passing
'VALUE (VALUE, VALUE, VALUE, VALUE, VALUE)' (aka 'unsigned long (unsigned long,
unsigned long, unsigned long, unsigned long, unsigned long)') to parameter of
type 'VALUE (*)(VALUE, VALUE, VALUE, VALUE)' (aka 'unsigned long (*)(unsigned
long, unsigned long, unsigned long, unsigned long)')
[-Wincompatible-function-pointer-types]
    rb_define_singleton_method(mHpricot, "css", hpricot_css, 3);
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  /usr/local/include/ruby-3.1/ruby/internal/anyargs.h:307:143: note: expanded
from macro 'rb_define_singleton_method'
  #define rb_define_singleton_method(obj, mid, func, arity)  
RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method((arity), (func))((obj),
(mid), (func), (arity))
									       
								^~~~~~
  /usr/local/include/ruby-3.1/ruby/internal/anyargs.h:270:1: note: passing
argument to parameter here
  RBIMPL_ANYARGS_DECL(rb_define_singleton_method, VALUE, const char *)
  ^

This is because the func parameter of rb_define_singleton_method() should be a
pointer to a function taking four VALUE parameters, not five.