unify player.html accross iOS and Android

Author: nklhtv

BeyondWordsPlayer/BeyondWordsPlayer/player.html

@@ -300,12 +300,12 @@
 
           if (!currentSegment) continue;
 
-          if (player.playbackState === "playing" && player.currentSegment?.startTime === currentSegment.startTime) {
+          if (player.playbackState === "playing" && player.currentSegment && player.currentSegment.startTime === currentSegment.startTime) {
             player.playbackState = "paused";
           } else {
             player.playbackState = "playing";
 
-            if (player.currentSegment?.startTime !== currentSegment.startTime)
+            if (!player.currentSegment || player.currentSegment.startTime !== currentSegment.startTime)
               player.currentTime = currentSegment.startTime;
           }