avcodec/avuienc: Use ff_alloc_packet()

This should be faster in theory for AVUI, no speed difference
meassurable though
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/avuienc.c

@@ -67,7 +67,7 @@ static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
         skip = 16;
     }
     size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;
-    if ((ret = ff_alloc_packet2(avctx, pkt, size)) < 0)
+    if ((ret = ff_alloc_packet(pkt, size)) < 0)
         return ret;
     dst = pkt->data;
     if (!interlaced) {