In case NAN macro is defined in math.h, prefer that over using the nan() function call.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@36647 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,9 @@
+2013-05-17  Ivan Vučica <ivan@vucica.net>
+
+	* Source/NSDate.m:
+	In case NAN macro is defined in math.h, prefer that over
+	using the nan() function call.
+
 2013-05-17  Richard Frith-Macdonald <rfm@gnu.org>
 
         * Source/NSMessagePortNameServer.m: fix error in line count check

Source/NSDate.m

@@ -1233,7 +1233,11 @@ otherTime(NSDate* other)
 - (NSTimeInterval) timeIntervalSinceDate: (NSDate*)otherDate
 {
   if (otherDate == nil)
+#ifndef NAN
     return nan("");
+#else
+    return NAN;
+#endif
 /*
     {
       [NSException raise: NSInvalidArgumentException