htl: Fix comparing attr with default values

Fortunately we were previously only missing an optimization.

Thanks dcb <dcb314@hotmail.com> for the report

	[BZ #23032]
	* sysdeps/htl/pt-barrier-init.c (pthread_barrier_init): Fix comparing
	attr with __pthread_default_barrierattr.
	* sysdeps/htl/pt-cond-init.c (__pthread_cond_init): Fix comparing
	attr with __pthread_default_condattr.
	* sysdeps/htl/pt-mutex-init.c (_pthread_mutex_init): Fix comparing
	attr with __pthread_default_mutexattr.
	* sysdeps/htl/pt-rwlock-init.c (_pthread_rwlock_init): Fix comparing
	attr with __pthread_default_rwlockattr.