adpcmenc: switch to ff_alloc_packet2()

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

libavcodec/adpcmenc.c

@@ -494,8 +494,7 @@ static int adpcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
         pkt_size = (2 + avctx->channels * (22 + 4 * (frame->nb_samples - 1)) + 7) / 8;
     else
         pkt_size = avctx->block_align;
-    if ((ret = ff_alloc_packet(avpkt, pkt_size))) {
-        av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+    if ((ret = ff_alloc_packet2(avctx, avpkt, pkt_size))) {
         return ret;
     }
     dst = avpkt->data;