svq3: unbreak decoding

a7d2861d removed necessary braces.

libavcodec/svq3.c

@@ -559,21 +559,23 @@ static int svq3_decode_mb(SVQ3Context *s, unsigned int mb_type)
             if (svq3_mc_dir(s, mb_type - 1, mode, 0, 0) < 0)
                 return -1;
         } else {        /* AV_PICTURE_TYPE_B */
-            if (mb_type != 2)
+            if (mb_type != 2) {
                 if (svq3_mc_dir(s, 0, mode, 0, 0) < 0)
                     return -1;
-            else
+            } else {
                 for (i = 0; i < 4; i++)
                     memset(h->cur_pic.f.motion_val[0][b_xy + i * h->b_stride],
                            0, 4 * 2 * sizeof(int16_t));
-            if (mb_type != 1)
+            }
+            if (mb_type != 1) {
                 if (svq3_mc_dir(s, 0, mode, 1, mb_type == 3) < 0)
                     return -1;
-            else
+            } else {
                 for (i = 0; i < 4; i++)
                     memset(h->cur_pic.f.motion_val[1][b_xy + i * h->b_stride],
                            0, 4 * 2 * sizeof(int16_t));
             }
+        }
 
         mb_type = MB_TYPE_16x16;
     } else if (mb_type == 8 || mb_type == 33) {   /* INTRA4x4 */