IE11 doesn't set 'paused' on the node when it ends, so check for both…

… 'paused' and 'ended'

Fixes goldfire#841

src/howler.core.js

@@ -1718,7 +1718,7 @@
       // If we are using IE and there was network latency we may be clipping
       // audio before it completes playing. Lets check the node to make sure it
       // believes it has completed, before ending the playback.
-      if (!self._webAudio && sound._node && !sound._node.paused) {
+      if (!self._webAudio && sound._node && !sound._node.paused && !sound._node.ended) {
         setTimeout(self._ended.bind(self, sound), 100);
         return self;
       }