cp-demangle.c (demangle_v3_with_details, [...]): Use K+R style function definition.

	* cp-demangle.c (demangle_v3_with_details,
	is_gnu_v3_mangled_ctor, is_gnu_v3_mangled_dtor): Use K+R style
	function definition.
	* ternary.c: Use K+R style function definitions.  Use PTR, not
	void *.  Make arguments constant where possible.
	* demangle.h: Use PARAMS for all prototypes.
	* ternary.h: Use PARAMS for all prototypes.  Use PTR, not void *.
	Make arguments constant where possible.

From-SVN: r41910