* gcc-interface/trans.c (lvalue_required_p) <N_Type_Conversion>): Look
	through it for elementary types as well.
	<N_Unchecked_Type_Conversion>: Adjust to above change.
	<N_Allocator>: Likewise.
	(gnat_to_gnu): Do not attempt to rewrite boolean literals.

From-SVN: r166532