_getPlan missing support for some Plan node elements

I was poking around the PREPARE/EXECUTE code, and I noticed _getPlan(Plan
*node) in readfuncs.c is missing support for 4 elements of the Plan struct.
Attached patch adds it.

If there are no objections, please apply.

Thanks,

Joe
Index: src/backend/nodes/readfuncs.c
===================================================================
RCS file: /opt/src/cvs/pgsql-server/src/backend/nodes/readfuncs.c,v
retrieving revision 1.136
diff -c -r1.136 readfuncs.c
*** src/backend/nodes/readfuncs.c    6 Nov 2002 00:00:44 -0000    1.136
--- src/backend/nodes/readfuncs.c    6 Nov 2002 17:20:33 -0000
***************
*** 332,337 ****
--- 332,350 ----
      token = pg_strtok(&length); /* eat :righttree */
      node->righttree = (Plan *) nodeRead(true);

+     token = pg_strtok(&length); /* eat :extprm */
+     node->extParam = toIntList(nodeRead(true));
+
+     token = pg_strtok(&length); /* eat :locprm */
+     node->locParam = toIntList(nodeRead(true));
+
+     token = pg_strtok(&length); /* eat :initplan */
+     node->initPlan = (List *) nodeRead(true);
+
+     token = pg_strtok(&length); /* eat :nprm */
+     token = pg_strtok(&length); /* get :nprm */
+     node->nParamExec = atoi(token);
+
      node->state = (EState *) NULL;        /* never read in */

      return;