PR c++/50852
	PR c++/53039
	* tree.c (strip_typedefs_expr): New.
	* cp-tree.h: Declare it.
	* pt.c (convert_template_argument, unify): Use it.
	* parser.c (cp_parser_template_declaration_after_export): Don't call
	fixup_template_parms.

From-SVN: r189298