wmalosslessdec: channel residues can be 32 bit thus need _long bitreader.

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

libavcodec/wmalosslessdec.c

@@ -496,9 +496,9 @@ static int decode_channel_residues(WmallDecodeCtx *s, int ch, int tile_size)
 
     if (s->seekable_tile) {
         if (s->do_inter_ch_decorr)
-            s->channel_residues[ch][0] = get_sbits(&s->gb, s->bits_per_sample + 1);
+            s->channel_residues[ch][0] = get_sbits_long(&s->gb, s->bits_per_sample + 1);
         else
-            s->channel_residues[ch][0] = get_sbits(&s->gb, s->bits_per_sample);
+            s->channel_residues[ch][0] = get_sbits_long(&s->gb, s->bits_per_sample);
         i++;
     }
     for (; i < tile_size; i++) {