Merge pull request #708 from jitsi/gsm_bars_fix

Fixes issue with gsm bars for remote participants are always full

modules/connectionquality/connectionquality.js

 
         var newVal = 100 - data.packetLoss.total;
         var oldVal = remoteConnectionQuality[id];
-        remoteConnectionQuality[id] = calculateQuality(newVal, oldVal);
+        remoteConnectionQuality[id] = calculateQuality(newVal, oldVal || 100);
 
         eventEmitter.emit(
             CQEvents.REMOTESTATS_UPDATED, id, remoteConnectionQuality[id],