pthread_attr_setschedinherit() and pthread_attr_setschedparam() updatethe wrong fields

[John Schmidt <john schmidt compuware com>]

Running example from "Programming with POSIX Threads" on RH 9.0 with 
glibc-2.3.2-11.9 and libpthread-0.29.so, these calls set|update the 
wrong fields in the pthread_attr_t, pthread_attr_setschedpolicy() 
updates __schedpolicy correctly.  Here's the gdb output:

152             status = pthread_attr_setschedparam (
153                 &thread_attr, &thread_param);