issue #204: fix get pthread id problem.

[suzp1984]

fix #204

[suzp1984]

This PR also can fix after merged to release branches.
signalwire/homebrew-signalwire#21

[andywolk]

This will overflow as returning uint64_t while function returns ks_pid_t that is pid_t aka int.

[suzp1984]

try fix it on commit : d2cae9c

[andywolk]

Please note there are places in the code under questions now:

uint32_t id = (uint32_t)ks_thread_self_id();

libks/src/ks_log.c

Line 203 in 5b9dcfb

used += snprintf(buf + used - 1, bufSize - used, "#%8.8X ", id);

libks/src/ks_log.c

Line 291 in 5b9dcfb

uint32_t id = (uint32_t)ks_thread_self_id();

or

static inline unsigned long ks_ssl_thread_id(void)
{
	return ks_thread_self_id();
}

CRYPTO_set_id_callback(ks_ssl_thread_id);