roqaudioenc: switch to ff_alloc_packet2()

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

libavcodec/roqaudioenc.c

@@ -171,8 +171,7 @@ static int roq_dpcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
     else
         data_size = avctx->channels * avctx->frame_size;
 
-    if ((ret = ff_alloc_packet(avpkt, ROQ_HEADER_SIZE + data_size))) {
-        av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+    if ((ret = ff_alloc_packet2(avctx, avpkt, ROQ_HEADER_SIZE + data_size))) {
         return ret;
     }
     out = avpkt->data;