GM (GM, Fortune 500) has raised the number of frontal-impact crashes linked to the problem ignitions to 47 from 32, according to company spokesman Greg Martin. Because of the flawed ignition, key rings holding more than one key could cause the ignition to suddenly switch to the off position. That can lead to a loss of power -- locking the steering wheel and interrupting airbags from deploying in an accident. GM says the number of deaths tied to front impact crashes stemming from this defect remains at 13. On Friday, the National Highway Traffic Safety Administration reportedly said the number...