MFC r344254-r344255

r344254:
Use DEV_TYP_NONE instead of -1 to indicate no device was specified.

DEV_TYP_NONE has a value of zero, which makes more sense since the device
type is a bunch of bits describing the device, crammed into an int.

r344255:
Fix more places to use DEV_TYP_NONE instead of -1 to indicate 'no device'.