use 0 instead of $defattr, as it isn't defined anymore on platforms using

use 0 instead of $defattr, as it isn't defined anymore on platforms using

2002-12-09  Sebastian Wilhelmi  <wilhelmi@ira.uka.de>

	* configure.in: use 0 instead of $defattr, as it isn't defined
	anymore on platforms using -pthread and linux, where this is used,
	only uses 0 anyway and not "pthread_attr_default".