8svx: copy start value in output samples.

Otherwise, the last byte of each stream is left uninitialized.

Signed-off-by: Nicolas George <nicolas.george@normalesup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/8svx.c

@@ -122,6 +122,7 @@ static int eightsvx_decode_frame(AVCodecContext *avctx, void *data,
             /* the uncompressed starting value is contained in the first byte */
             dst = esc->samples;
             for (i = 0; i < avctx->channels; i++) {
+                *(dst++) = buf[0];
                 delta_decode(dst, buf + 1, buf_size / avctx->channels - 1, buf[0], esc->table);
                 buf += buf_size / avctx->channels;
                 dst += n / avctx->channels - 1;

tests/ref/fate/iff-fibonacci

-e76b025238a6a27968f8644f4ccc3207
+96a20cd1fae705cbc11eee5d6046b8e4