Improve pthread_attr_get_np() by enabling it to return thread's real stack address instead of specified by pthread_attr_t passed to pthread_create().
Improve pthread_attr_get_np() by enabling it to return thread's real stack
address instead of specified by pthread_attr_t passed to pthread_create().

Suggested by:	deischen

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase