From 6ba9b402eced1f2da4541229b8fd0c03fe2008cd Mon Sep 17 00:00:00 2001
From: Tony Garnock-Jones <tonygarnockjones@gmail.com>
Date: Wed, 11 May 2016 10:59:44 -0400
Subject: [PATCH] Only trigger onStateChange with non-empty patch (?)

---
 js/src/dataspace.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/js/src/dataspace.js b/js/src/dataspace.js
index 6234748..d5bb7a4 100644
--- a/js/src/dataspace.js
+++ b/js/src/dataspace.js
@@ -280,7 +280,9 @@ Dataspace.prototype.deliverPatches = function (oldMux, updateStreamResult) {
     self.deliverEvent(pid, stateChange(patch));
   });
   events.metaEvents.forEach(Dataspace.stateChange);
-  this.onStateChange(this.mux, updateStreamResult.deltaAggregate);
+  if (!updateStreamResult.deltaAggregate.isEmpty()) {
+    this.onStateChange(this.mux, updateStreamResult.deltaAggregate);
+  }
 };
 
 Dataspace.prototype.deliverEvent = function (pid, event) {