mozilla-b2g/gaia — pull request #6621 by gtorodelvalle (2012-11-26 11:17:06+00:00)
Title: Bug 813676 - While on a call a long press on 0 should not generate a '+' since the DTMF sent will always be 0 (r=fcampo).

Basically, we delete the '+' from the 0 key and avoid including a '+' in the number area when long pressing on it