Tidy fill hstv array (src/backend/access/heap/pruneheap.c)

Hi,

The function heap_page_prune (src/backend/access/heap/pruneheap.c)

Has a comment:

"/*
 * presult->htsv is not initialized here because all ntuple spots in the
 * array will be set either to a valid HTSV_Result value or -1.
 */

IMO, this is a little bogus and does not make sense.

I think it would be more productive to initialize the entire array with -1, and avoid flagging, one by one, the items that should be -1.

Patch attached.

best regards,

Ranier Vilela