Fix audio playback.

// FREEBIE

Signal/src/Models/TSMessageAdapaters/TSVideoAttachmentAdapter.m

@@ -151,6 +151,7 @@ NS_ASSUME_NONNULL_BEGIN
         _audioPlayPauseButton = [[UIButton alloc] initWithFrame:CGRectMake(3, 3, 30, 30)];
         [_audioPlayPauseButton setBackgroundImage:[UIImage imageNamed:@"audio_play_button"]
                                          forState:UIControlStateNormal];
+        _audioPlayPauseButton.enabled = NO;
 
         AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&err];
         _durationLabel        = [[UILabel alloc] init];
@@ -180,13 +181,9 @@ NS_ASSUME_NONNULL_BEGIN
         [audioBubble addSubview:_durationLabel];
 
         if (!_incoming) {
-            __weak TSVideoAttachmentAdapter *weakSelf = self;
             self.attachmentUploadView = [[AttachmentUploadView alloc] initWithAttachment:self.attachment
                                                                                superview:audioBubble
-                                                                 attachmentStateCallback:^(BOOL isAttachmentReady) {
+                                                                 attachmentStateCallback:nil];
-                                                                     weakSelf.audioPlayPauseButton.enabled
-                                                                         = isAttachmentReady;
-                                                                 }];
         }
 
         return audioBubble;

Signal/src/ViewControllers/MessagesViewController.m

@@ -1699,7 +1699,8 @@ typedef enum : NSUInteger {
                                     NSIndexPath *indexPathI = [NSIndexPath indexPathForRow:i inSection:0];
                                     id<OWSMessageData> message = [self messageAtIndexPath:indexPathI];
 
-                                    if (message.messageType == TSIncomingMessageAdapter && message.isMediaMessage) {
+                                    if (message.messageType == TSIncomingMessageAdapter && message.isMediaMessage &&
+                                        [[message media] isKindOfClass:[TSVideoAttachmentAdapter class]]) {
                                         TSVideoAttachmentAdapter *msgMedia
                                             = (TSVideoAttachmentAdapter *)[message media];
                                         if ([msgMedia isAudio]) {