Address review comments

Author: mohd-akram

lib/channel_model.js

@@ -282,11 +282,17 @@ class ConfirmChannel extends Channel {
             if (err === null) resolve();
             else reject(err);
           };
-          if (!this.pending) unconfirmed[index](new Error('channel closed'))
         });
         awaiting.push(confirmed);
       }
     });
+    // Channel closed
+    if (!this.pending) {
+      var cb;
+      while (cb = this.unconfirmed.shift()) {
+        if (cb) cb(new Error('channel closed'));
+      }
+    }
     return Promise.all(awaiting);
   }
 }

test/channel.js

@@ -75,7 +75,7 @@ var DELIVER_FIELDS = {
   replyText: 'derp',
 };
 
-async function open(ch) {
+function open(ch) {
   ch.allocate();
   return promisify(function(cb) {
     ch._rpc(defs.ChannelOpen, {outOfBand: ''}, defs.ChannelOpenOk, cb);