conformtest: Fix isnan function return type

[Joseph S. Myers]

XPG3 / XPG4 / UNIX98 define an insan function, a predecessor of the
C99 type-generic isnan macro.  The conformtest data for this function
wrongly lists its return type as double instead of int.  This patch
fixes this.

Tested x86_64.

2012-11-07  Joseph Myers  <joseph@codesourcery.com>

	* conform/data/math.h-data [XPG3 || XPG4 || UNIX98] (isnan):
	Change function return type to int.

diff --git a/conform/data/math.h-data b/conform/data/math.h-data
index 0d9246d..0a05b8d 100644
--- a/conform/data/math.h-data
+++ b/conform/data/math.h-data
@@ -18,7 +18,7 @@ type float_t
 type double_t
 # endif
 # if defined XPG3 || defined XPG4 || defined UNIX98
-function double isnan (double)
+function int isnan (double)
 # endif
 
 # if !defined ISO99 && !defined ISO11 && !defined POSIX2008

-- 
Joseph S. Myers
joseph@codesourcery.com