use proper feature test macros for isnan

Problem pointed out in bug 581354
This commit is contained in:
Matthias Clasen 2010-07-10 20:00:49 -04:00
parent d9dc570c59
commit 7568bb66f9

View File

@ -19,6 +19,7 @@
* if advised of the possibility of such damage.
*/
#define _XOPEN_SOURCE
#include <ctype.h>
#include <errno.h>
#include <locale.h>