Avoid unnecessary MemSet call
The variable in question was changed from a struct to a pointer some
time ago (
77947c51c08). Using MemSet to zero it still works but is
obviously unidiomatic and confusing, so change it to a straight
assignment.
Author: Ranier Vilela <ranier.vf@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CAEudQApCeq4JjW1BdnwU=m=-DvG5WyUik0Yfn3p6UNphiHjj+w@mail.gmail.com