PR c++/20073
	* decl.c (start_decl_1): Don't clear TREE_READONLY.
	(cp_finish_decl): Likewise.
	(complete_vars): Call cp_apply_type_quals_to_decl.
	* typeck.c (cp_apply_type_quals): Avoid setting TREE_READONLY in
	cases where that's not valid.

	PR c++/20073
	* g++.dg/init/const1.C: New test.

From-SVN: r95441