pgsql: Fix oversight in 7a05425d96

Fix oversight in 7a05425d96

This patch was changed as a result of review but one line didn't get the
message. Mea Culpa.

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/203942243c2a2da188db962f3384f1c607a462b5

Modified Files
--------------
contrib/ltree/ltree_io.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)