pcm: switch to ff_alloc_packet2().

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/pcm.c

@@ -96,8 +96,7 @@ static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
     n           = frame->nb_samples * avctx->channels;
     samples     = (const short *)frame->data[0];
 
-    if ((ret = ff_alloc_packet(avpkt, n * sample_size))) {
-        av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+    if ((ret = ff_alloc_packet2(avctx, avpkt, n * sample_size))) {
         return ret;
     }
     dst = avpkt->data;