reset seekbar to zero on init, fix equals() for AudioSlide

src/org/thoughtcrime/securesms/components/AudioView.java

@@ -80,6 +80,7 @@ public class AudioView extends FrameLayout implements AudioSlidePlayer.Listener
   {
     controlToggle.displayQuick(playButton);
     seekBar.setEnabled(true);
+    seekBar.setProgress(0);
     audioSlidePlayer = AudioSlidePlayer.createFor(getContext(), audio, this);
     timestamp.setText(DateUtils.getFormatedDuration(duration));
 
@@ -155,7 +156,7 @@ public class AudioView extends FrameLayout implements AudioSlidePlayer.Listener
 
   @Override
   public void onProgress(AudioSlide slide, double progress, long millis) {
-    if (audioSlidePlayer.getAudioSlide().getDcMsgId() != slide.getDcMsgId()) {
+    if (!audioSlidePlayer.getAudioSlide().equals(slide)) {
       return;
     }
     int seekProgress = (int) Math.floor(progress * this.seekBar.getMax());

src/org/thoughtcrime/securesms/mms/AudioSlide.java

@@ -45,6 +45,13 @@ public class AudioSlide extends Slide {
     super(context,  new UriAttachment(uri, null, contentType, AttachmentDatabase.TRANSFER_PROGRESS_STARTED, dataSize, 0, 0, null, null, voiceNote));
   }
 
+  @Override
+  public boolean equals(Object other) {
+      if (other == null)                  return false;
+      if (!(other instanceof AudioSlide)) return false;
+      return this.getDcMsgId() == ((AudioSlide)other).getDcMsgId();
+  }
+
   @Override
   @Nullable
   public Uri getThumbnailUri() {