Fix for infinite loop when searching for relay frame.

close #846

resources/static/lib/winchan.js

@@ -52,7 +52,7 @@
     var loc = window.location;
     var frames = window.opener.frames;
     var origin = loc.protocol + '//' + loc.host;
-    for (i = frames.length - 1; i >= 0; i++) {
+    for (var i = frames.length - 1; i >= 0; i--) {
       try {
         if (frames[i].location.href.indexOf(origin) === 0 &&
             frames[i].name === RELAY_FRAME_NAME)