Code simplification
Initialize TriggerData to 0 for the whole struct together, instead of
each field separately.
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://www.postgresql.org/message-id/flat/
11c5f156-67a9-0fb5-8200-
2a8018eb2e0c@2ndquadrant.com