From e6d6c5c56ea854db20f537c827b53342f75fcc5c Mon Sep 17 00:00:00 2001
From: Michael Jumper <mike.jumper@guac-dev.org>
Date: Wed, 9 Dec 2015 19:43:44 -0800
Subject: [PATCH] GUAC-1428: Do not call handlers on non-existent streams.

---
 guacamole-common-js/src/main/webapp/modules/Client.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/guacamole-common-js/src/main/webapp/modules/Client.js b/guacamole-common-js/src/main/webapp/modules/Client.js
index 463049687..51d5914bd 100644
--- a/guacamole-common-js/src/main/webapp/modules/Client.js
+++ b/guacamole-common-js/src/main/webapp/modules/Client.js
@@ -691,7 +691,8 @@ Guacamole.Client = function(tunnel) {
             var stream = streams[stream_index];
 
             // Write data
-            stream.onblob(data);
+            if (stream && stream.onblob)
+                stream.onblob(data);
 
         },
 
@@ -890,7 +891,7 @@ Guacamole.Client = function(tunnel) {
             var stream = streams[stream_index];
 
             // Signal end of stream
-            if (stream.onend)
+            if (stream && stream.onend)
                 stream.onend();
 
         },