Only populate workersData if messageId is "resubmit"

This is done to avoid clash with UrlClassifier

lib/HistoryReader.js

@@ -111,10 +111,9 @@ HistoryReader.prototype = {
 
   _handleInterestsResults: function I__handleInterestsResults(aData) {
     Task.spawn(function() {
-      // save classification results in _workersData array untill all have responded
-      this._workersData.push(aData);
-      // and check if this is the last interest in the resubmit bunch
       if (aData.messageId == "resubmit") {
+        // save classification results in _workersData array untill all have responded
+        this._workersData.push(aData);
         // decrement url count and check if we have seen them all
         this._ResubmitRecentHistoryUrlCount--;
         if (this._ResubmitRecentHistoryUrlCount == 0) {