Fix incompatible pointer types (32-bit)

[remicollet]

This is now an error (GCC 14 on Fedora 40), and indeed a real problem

/builddir/build/BUILD/php-pecl-memcached-3.2.0/NTS/php_memcached.c: In function 's_compress_value':
/builddir/build/BUILD/php-pecl-memcached-3.2.0/NTS/php_memcached.c:903:65: error: passing argument 2 of 'compress' from incompatible pointer type [-Wincompatible-pointer-types]
  903 |                         int status = compress((Bytef *) buffer, &compressed_size, (Bytef *) ZSTR_VAL(payload), ZSTR_LEN(payload));
      |                                                                 ^~~~~~~~~~~~~~~~
      |                                                                 |
      |                                                                 size_t * {aka unsigned int *}
In file included from /builddir/build/BUILD/php-pecl-memcached-3.2.0/NTS/php_memcached.c:38:
/usr/include/zlib.h:1215:68: note: expected 'long unsigned int *' but argument is of type 'size_t *' {aka 'unsigned int *'}
 1215 | Z_EXTERN int Z_EXPORT compress(unsigned char *dest, unsigned long *destLen, const unsigned char *source, unsigned long sourceLen);
      |                                                     ~~~~~~~~~~~~~~~^~~~~~~
/builddir/build/BUILD/php-pecl-memcached-3.2.0/NTS/php_memcached.c: In function 's_decompress_value':
/builddir/build/BUILD/php-pecl-memcached-3.2.0/NTS/php_memcached.c:3636:72: error: passing argument 2 of 'uncompress' from incompatible pointer type [-Wincompatible-pointer-types]
 3636 |                 decompress_status = (uncompress((Bytef *) buffer->val, &buffer->len, (Bytef *)payload, payload_len) == Z_OK);
      |                                                                        ^~~~~~~~~~~~
      |                                                                        |
      |                                                                        size_t * {aka unsigned int *}
/usr/include/zlib.h:1251:70: note: expected 'long unsigned int *' but argument is of type 'size_t *' {aka 'unsigned int *'}
 1251 | Z_EXTERN int Z_EXPORT uncompress(unsigned char *dest, unsigned long *destLen, const unsigned char *source, unsigned long sourceLen);
      |                                                       ~~~~~~~~~~~~~~~^~~~~~~

[remicollet]

Failed build without the patch: https://koji.fedoraproject.org/koji/taskinfo?taskID=112369955
Succeeded build with the patch: https://koji.fedoraproject.org/koji/taskinfo?taskID=112598358