callmodel: emit currentCall changed

Else, because we show the incomingCallView, the currentCall may
be different to what we show

Change-Id: I8d996df5db22a8b2cb4a69ed070c278c08816b07

src/libclient/callmodel.cpp

@@ -1739,8 +1739,7 @@ CallModelPimpl::slotConferenceChanged(const QString& accountId,
         if (call == currentCall_)
             currentCall_ = confId;
     }
-    if (currentCallId != currentCall_)
-        Q_EMIT linked.currentCallChanged(confId);
+    Q_EMIT linked.currentCallChanged(currentCall_);
 }
 
 void