libopencore-amr: switch to ff_alloc_packet2().

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

libavcodec/libopencore-amr.c

@@ -244,8 +244,7 @@ static int amr_nb_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
         s->enc_bitrate = avctx->bit_rate;
     }
 
-    if ((ret = ff_alloc_packet(avpkt, 32))) {
-        av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+    if ((ret = ff_alloc_packet2(avctx, avpkt, 32))) {
         return ret;
     }