Merge pull request #366 from karendolan/multiple-seek-buffer-stall-KD

Prevent jumpy timeline when doing multiple quick successive seeks with HLS video

src/js/videoFormats/es.upv.paella.hlsVideoFormat.js

@@ -309,6 +309,9 @@ export class HlsVideo extends Mp4Video {
         else {
             await (new Promise((resolve,reject) => {
                 const checkReady = () => {
+		    if (this._ready) {
+                        resolve();
+                    }
                     // Make a special case to allow Firefox to play at readyState 2.
                     // Browsers like Safari drop from readyState 3 to readyState 2 when the video is
                     // buffering and cannot be played. Chrome moves quickly between ready state
@@ -491,4 +494,5 @@ export default class HlsVideoPlugin extends VideoPlugin {
             }))
         };
     }
-}
+}
+