Here is the patch for this specific bug:
http://cgit.freedesktop.org/telepathy/telepathy-mission-control/commit/?h=telepathy-mission-control-5.12&id=eaefb264316f206186b2ac7f1f36e6a4692deb3d
although I recommend upgrading to 5.14.0 instead. 5.13.x were a development branch and will not receive bugfix releases.
Here is the patch for this specific bug:
http:// cgit.freedeskto p.org/telepathy /telepathy- mission- control/ commit/ ?h=telepathy- mission- control- 5.12&id= eaefb264316f206 186b2ac7f1f36e6 a4692deb3d
although I recommend upgrading to 5.14.0 instead. 5.13.x were a development branch and will not receive bugfix releases.