*** src/backend/utils/adt/numutils.c.orig	Sun Mar  1 00:58:32 1998
--- src/backend/utils/adt/numutils.c	Sun Mar  1 01:00:44 1998
***************
*** 55,60 ****
--- 55,67 ----
  
  	Assert(s);
  
+ 	/* Some versions of strtol treat the empty string as an error.  This
+ 	 * code will make those versions of strtol return 0 for an empty string.
+ 	 */
+ 
+ 	if (s == (char *)NULL || *s == 0)
+ 		return ((int32)0);
+ 
  	errno = 0;
  	l = strtol(s, &badp, 10);
  	if (errno)					/* strtol must set ERANGE */