doc: Add missing include in example code

Peter Eisentraut <peter_e@gmx.net>

Commit: aa09b9dcd57cbf18516332bf8310c12ef6f83715
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2017-02-02T21:50:28Z
Releases: 10.0
doc: Add missing include in example code

It's not broken because the header file is included via other headers,
but for better style we should be more explicit.

Reported-by: mthrockmorton@hme.com

Files

PathChange+/−
doc/src/sgml/trigger.sgml modified +1 −0

Documentation touched