Add #include <float.h> for platforms that still need it.

src/backend/utils/adt/float.c

@@ -8,13 +8,14 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.132 2007/01/02 20:00:49 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.133 2007/01/02 20:50:35 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
 #include "postgres.h"
 
 #include <ctype.h>
+#include <float.h>
 #include <math.h>
 #include <limits.h>
 /* for finite() on Solaris */