* dbus/dbus-connection.h, dbus/dbus-connection.c: have object path
	registration functions take the path argument as char* instead of
	char**.

	* dbus/dbus-marshal.h, dbus/dbus-marshal.c (_dbus_decompose_path):
	split off the path decompostion part of
	_dbus_demarshal_object_path. Some misc. fixes to silence compiler
	warnings.

	* glib/dbus-gobject.c, test/test-service.c: update accordingly.