yuv4enc: switch to ff_alloc_packet2().

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

libavcodec/yuv4enc.c

@@ -42,8 +42,7 @@ static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     uint8_t *y, *u, *v;
     int i, j, ret;
 
-    if ((ret = ff_alloc_packet(pkt, 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1))) < 0) {
-        av_log(avctx, AV_LOG_ERROR, "Out buffer is too small.\n");
+    if ((ret = ff_alloc_packet2(avctx, pkt, 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1))) < 0) {
         return ret;
     }
     dst = pkt->data;