Volume change ineffective during call

[Omer Akram]

1. Ensure a call
2. try to reduce the volume to zero

What happens:
You can still hear the sound in the earpiece or on the speaker in case of loudspeaker enabled.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: telephony-service 0.1+14.10.20140618-0ubuntu1
Uname: Linux 3.4.0-5-mako armv7l
ApportVersion: 2.14.3-0ubuntu2
Architecture: armhf
Date: Tue Jul 1 14:16:02 2014
InstallationDate: Installed on 2014-06-30 (1 days ago)
InstallationMedia: Ubuntu Utopic Unicorn (development branch) - armhf (20140630-020204)
SourcePackage: telephony-service
UpgradeStatus: No upgrade log present (probably fresh install)
upstart.telephony-service-indicator.log:
 void CallManager::onCallEnded()

 (process:3277): GLib-GObject-CRITICAL **: g_value_get_int64: assertion 'G_VALUE_HOLDS_INT64 (value)' failed
 void CallManager::onCallEnded()