AW: PG19beta1: GCC 16.1.1 warning: ‘actual_arg_types’ may be used uninitialized in clauses.c

[Hans Buschmann]

I also can confirm that this silences the compiler warning of GCC 16.1.1.

(tested with pg19_beta1, but should be the same on stable branches like 18.4)

No further tests here.

Hans Buschmann