pgsql: Silence "may be used uninitialized" compiler warning.

Silence "may be used uninitialized" compiler warning.

Newer gcc warns that this "actual_arg_types" variable may be used
uninitialized, but visual inspection indicates there's no bug. To
silence the warning, initialize the variable to zeros.

Bug: #19485
Reported-by: Hans Buschmann <buschmann(at)nidsa(dot)net>
Tested-by: Erik Rijkers <er(at)xs4all(dot)nl>
Tested-by: Hans Buschmann <buschmann(at)nidsa(dot)net>
Reviewed-by: Tristan Partin <tristan(at)partin(dot)io>
Reviewed-by: Álvaro Herrera <alvherre(at)kurilemu(dot)de>
Discussion: https://postgr.es/m/19485-2b03231a775756f1%40postgresql.org
Discussion: https://postgr.es/m/6c52a1a6612948519468d46cb224a8c4%40nidsa.net

Branch
------
REL_17_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/7fbbe75875ca510c4fe730c2ecbb48bf54001574

Modified Files
--------------
src/backend/optimizer/util/clauses.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)