www/mod_perl2: fix build with clang 19 on i386
Clang 19 has become more strict about incompatible function pointer
types, which results in an error building mod_perl2 on i386:
modperl_common_util.c:57:53: error: incompatible function pointer types initializing 'int (*)(PerlInterpreter *, SV *, MAGIC *, SV *, const char *, I32)' (aka 'int (*)(struct interpreter *, struct sv *, struct magic *, struct sv *, const char *, long)') with an expression of type 'int (PerlInterpreter *, SV *, MAGIC *, SV *, const char *, int)' (aka 'int (struct interpreter *, struct sv *, struct magic *, struct sv *, const char *, int)') [-Wincompatible-function-pointer-types]
57 | modperl_table_magic_copy};
| ^~~~~~~~~~~~~~~~~~~~~~~~Perl uses the type I32 for the last parameter, which is apparently
long on i386. So use that instead.
PR: 281594
MFH: 2024Q3
(cherry picked from commit 99f25aaa64395af55a872fc6cf77127f5f0e4997)