avcodec/snowdec: Remove unneeded {}

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/snowdec.c

@@ -512,14 +512,12 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
             }
         }
 
-        {
         for(level=0; level<s->spatial_decomposition_count; level++){
             for(orientation=level ? 1 : 0; orientation<4; orientation++){
                 SubBand *b= &p->band[level][orientation];
                 unpack_coeffs(s, b, b->parent, orientation);
             }
         }
-        }
 
         {
         const int mb_h= s->b_height << s->block_max_depth;