Still another place to make the world safe for zero-column tables.

Per example from Jiang Wei.

src/backend/executor/execJunk.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/execJunk.c,v 1.38 2004/01/07 18:56:26 neilc Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/execJunk.c,v 1.39 2004/04/07 18:46:12 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -263,12 +263,6 @@ ExecRemoveJunk(JunkFilter *junkfilter, TupleTableSlot *slot)
 	cleanLength = junkfilter->jf_cleanLength;
 	cleanMap = junkfilter->jf_cleanMap;
 
-	/*
-	 * Handle the trivial case first.
-	 */
-	if (cleanLength == 0)
-		return NULL;
-
 	/*
 	 * Create the arrays that will hold the attribute values and the null
 	 * information for the new "clean" tuple.