Avoid possible useless call to makeNode function (src/backend/commands/view.c)

[Ranier Vilela]

Hi.

With the function *DefineVirtualRelation* has a possible
useless call to *makeNode* function, which invokes palloc.

So, reduce the scope for the variable to inner else
where it is really necessary.

trivial patch attached.

best regards,
Ranier Vilela

0001-avoid-possible-useless-palloc-view.patch
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