trans.c (Identifier_to_gnu): Use boolean variable.
* gcc-interface/trans.c (Identifier_to_gnu): Use boolean variable.
(call_to_gnu): Test gigi's flag TYPE_BY_REFERENCE_P instead of calling
front-end's predicate Is_By_Reference_Type. Use consistent order and
remove ??? comment. Use original conversion in all cases, if any.
* gcc-interface/utils.c (make_dummy_type): Minor tweak.
(convert): Use local copy in more cases.
<INDIRECT_REF>: Remove deactivated code.
(unchecked_convert): Use a couple of local copies.