ALSA: pcm - Fix hwptr buffer-size overlap bug

The fix 79452f0a introduced another
bug due to the missing offset for the overlapped hwptr.
When the hwptr goes back to zero, the delta value has to be corrected
with the buffer size.  Otherwise this causes looping sounds.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/pcm_lib.c

@@ -256,7 +256,7 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
 			delta = new_hw_ptr - hw_ptr_interrupt;
 	}
 	if (delta < 0) {
-		if (runtime->periods == 1)
+		if (runtime->periods == 1 || new_hw_ptr < old_hw_ptr)
 			delta += runtime->buffer_size;
 		if (delta < 0) {
 			hw_ptr_error(substream,