minor change for create_list_bounds()

[Zhihong Yu]

Hi,
I was looking at commit db632fbca and noticed that,
in create_list_bounds(), if index is added to boundinfo->interleaved_parts
in the first if statement, there is no need to perform the second check
involving call to partition_bound_accepts_nulls().

Here is a short patch.

Cheers

list-bound-accepts-null.patch
Description: Binary data