mesa: fpclassify is available on Haiku

Reviewed-by: Brian Paul <brianp@vmare.com>
Signed-off-by: Brian Paul <brianp@vmware.com>

src/mesa/main/querymatrix.c

@@ -73,7 +73,7 @@ fpclassify(double x)
 #elif defined(__APPLE__) || defined(__CYGWIN__) || defined(__FreeBSD__) || \
      defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \
      (defined(__sun) && defined(__C99FEATURES__)) || defined(__MINGW32__) || \
-     (defined(__sun) && defined(__GNUC__)) || defined(ANDROID)
+     (defined(__sun) && defined(__GNUC__)) || defined(ANDROID) || defined(__HAIKU__)
 
 /* fpclassify is available. */