Make sure LocalSSRCReplacement is cleared when a new peer connection is created

modules/xmpp/JingleSessionPC.js

@@ -93,6 +93,8 @@ JingleSessionPC.prototype.doInitialize = function () {
     this.isreconnect = false;
     // Set to true if the connection was ever stable
     this.wasstable = false;
+    //Make sure we clear out stored ssrcs from previous peer connections
+    SSRCReplacement.init();
 
     this.peerconnection = new TraceablePeerConnection(
             this.connection.jingle.ice_config,

modules/xmpp/LocalSSRCReplacement.js

@@ -141,6 +141,15 @@ function generateRecvonlySSRC() {
 }
 
 var LocalSSRCReplacement = {
+    /**
+     * Initialize the module
+     */
+    init: function() {
+        localVideoSSRC = null;
+        localRecvOnlySSRC = null;
+        localRecvOnlyCName = null;
+    },
+
     /**
      * Method must be called before 'session-initiate' or 'session-invite' is
      * sent. Scans the IQ for local video SSRC and stores it if detected.