Log index for each line of output

(cherry picked from commit 9e2ccb2de8d4dc5179cd86610b129500e6223be7)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/wmalosslessdec.c

@@ -680,6 +680,7 @@ static int decode_channel_residues(WmallDecodeCtx *s, int ch, int tile_size)
             s->channel_residues[ch][0] = get_sbits(&s->gb, s->bits_per_sample);
         i++;
     }
+    av_log(0, 0, "%8d: ", num_logged_tiles++);
     for(; i < tile_size; i++) {
         int quo = 0, rem, rem_bits, residue;
         while(get_bits1(&s->gb))