Fix integer overflow bug in read_signal_strength() reported by Anthony
Leclerc.
Signed-off-by: NJohannes Stezenbach <js@linuxtv.org>
Signed-off-by: NMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>