EXPLAIN Verbose issue - custom_scan_tlist can directly refer CTE and Subquery

Hi,

While designing a CustomScan node, I got stuck into two errors:
1. "failed to find plan for CTE."
2. "failed to find plan for subquery."
After a short research, I found commit 3f50b82, which shows the problem's origins - setrefs don't change the varno of
custom_scan_tlistand can directly reference CTE or Subquery entry. In the "EXPLAIN VERBOSE" case, the deparsing routine
can'tfind dpns->inner_plan for such an entry.
 

Regards,
Andrei Lepikhov