优化判断代码逻辑

accompany/src/main/java/com/daya/orchestra/accompany/player/CustomPlayer.java

@@ -111,7 +111,7 @@ public class CustomPlayer implements MediaPlayer.OnErrorListener, MediaPlayer.On
         if (null != mPlayer && hasPrepared) {
             mPlayer.start();
             setVolume(isNeedMute ? 0f : 1f);
-            if (prepareSeekPosition != -1) {
+            if (prepareSeekPosition > 0) {
                 seekTo(prepareSeekPosition);
             }
         }