c++: aggregate prvalue as for range [PR106230]

c++: aggregate prvalue as for range [PR106230]

Since my PR94041 work on temporary lifetime in aggregate initialization, we
end up calling build_vec_init to initialize the reference-extended temporary
for the artificial __for_range variable.  And build_vec_init uses
finish_for_stmt to implement its loop.  That function assumes that if
__for_range is in current_binding_level, we're finishing a range-for, and we
should fix up the variable as it goes out of scope.  But when called from
build_vec_init we aren't finishing a range-for, and do_poplevel doesn't
remove the variable from scope because stmts_are_full_exprs_p is false.  So
let's check that here as well, and leave the DECL_NAME alone.

	PR c++/106230

gcc/cp/ChangeLog:

	* semantics.cc (finish_for_stmt): Check stmts_are_full_exprs_p.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp0x/range-for38.C: New test.