cp-demangle.c (demangle_encoding): Rename variable.

	* cp-demangle.c (demangle_encoding): Rename variable.
	(demangle_name): Rename parameter.  Handle return type
	suppression.
	(demangle_nested_name): Rename parameter.
	(demangle_prefix): Likewise.  Change return type suppression.
	(demangle_unqualified_name): Add parameter.  Flag constructors and
	conversion operators.
	(demangle_special_name): Fix comment.
	(demangle_type): Rename variable.
	(demangle_bare_function_type): Check for missing return type and
	parameter.
	(demangle_class_enum_type): Rename parameter.
	(demangle_discriminator): Fix misspelling in comment.

From-SVN: r36168