audioqueue: don't avoid impossible case

Play() should always be fed with valid block_t *

modules/audio_output/audioqueue.c

@@ -156,7 +156,6 @@ static void Stop (audio_output_t *p_aout)
 
 static void Play (audio_output_t *p_aout, block_t *p_block)
 {
-    if (p_block != NULL) {
     AudioQueueBufferRef inBuffer = NULL;
     OSStatus status;
 
@@ -174,7 +173,6 @@ static void Play (audio_output_t *p_aout, block_t *p_block)
     status = AudioQueueEnqueueBuffer(p_aout->sys->audioQueue, inBuffer, 0, NULL);
     if (status != noErr)
         msg_Err(p_aout, "enqueuing buffer failed (%li)", status);
-    }
 }
 
 void AudioQueueCallback(void * inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer) {