Improve readability of factorial, from Florian Weimer.

src/backend/utils/adt/int.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/int.c,v 1.49 2002/06/07 23:41:53 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/int.c,v 1.50 2002/06/07 23:43:17 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -786,7 +786,7 @@ int4fac(PG_FUNCTION_ARGS)
 
 	if (arg1 == 0)
 		result = 1;
-	else if (arg1 < 1)
+	else if (arg1 < 0)
 		result = 0;
 	else
 		for (result = 1; arg1 > 0; --arg1)
@@ -802,7 +802,7 @@ int2fac(PG_FUNCTION_ARGS)
 
 	if (arg1 == 0)
 		result = 1;
-	else if (arg1 < 1)
+	else if (arg1 < 0)
 		result = 0;
 	else
 		for (result = 1; arg1 > 0; --arg1)