Warnings with LLVM on macOS and Postgres 17 or earlier

[theory]

In file included from pgch_test.c:65:
../pg-clickhouse-encode.h:1779:54: warning: incompatible pointer types
      passing 'int64_t *' (aka 'long long *') to parameter of type 'int64 *' (aka 'long *')
      [-Wincompatible-pointer-types]
 1779 |                 if (pg_mul_s64_overflow(secs, power, &raw) ||
      |                                                      ^~~~
/Users/david/.pgenv/pgsql-17.11/include/server/common/int.h:219:46: note: 
      passing argument to parameter 'result' here
  219 | pg_mul_s64_overflow(int64 a, int64 b, int64 *result)
      |                                              ^
In file included from pgch_test.c:65:
../pg-clickhouse-encode.h:1780:78: warning: incompatible pointer types
      passing 'int64_t *' (aka 'long long *') to parameter of type 'int64 *' (aka 'long *')
      [-Wincompatible-pointer-types]
 1780 |                     pg_add_s64_overflow(raw, us_rem * power / USECS_PER_SEC, &raw)) {
      |                                                                              ^~~~
/Users/david/.pgenv/pgsql-17.11/include/server/common/int.h:161:46: note: 
      passing argument to parameter 'result' here
  161 | pg_add_s64_overflow(int64 a, int64 b, int64 *result)
      |                                              ^
2 warnings generated.