Boeing’s chief financial officer said the company will decide “later this year” whether to slow, or even stop, manufacturing on the mammoth C-17 military cargo plane that employs hundreds of people in St. Louis. The Pentagon has said repeatedly that it needs no new ones. But Boeing has prolonged C-17 manufacturing by finding international customers, and it has contracts to deliver 10 more, mostly to India, through the third quarter of next year. For now at least, that’s the end of the line. But the CFO signaled that more small international orders could lay ahead. The plane’s nose, cargo door and other large components are constructed in St. Louis.