mozilla-b2g/gaia — pull request #20407 by arvin-zhang (2014-06-12 05:56:17+00:00)
Title: Bug 1017614 - [gaia_dialer] DTMF will never be stopped once the max length of pone number inputed on a call

Under the current processing mechanism of long type dtmf tone, we should force to _stopDtmfTone to stop dtmf tone once input number reached 50 and to reset _lastPressedKey as null at the same time.