Narrow the scope of a local variable.
This is better style and more symmetrical with the other if-branch.
This likely should have been included in
9de77b545 (which created
the opportunity), but it was overlooked.
Japin Li
Discussion: https://postgr.es/m/MEYP282MB16699FA4A7CD57EB250E871FB6A40@MEYP282MB1669.AUSP282.PROD.OUTLOOK.COM