avcodec/wavpack: fix some syle issues

libavcodec/wavpack.c

@@ -1505,28 +1505,30 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
 
     if (s->stereo_in) {
         if (got_dsd) {
-            if (dsd_mode == 3)
+            if (dsd_mode == 3) {
                 ret = wv_unpack_dsd_high(s, samples_l, samples_r);
-            else if (dsd_mode == 1)
+            } else if (dsd_mode == 1) {
                 ret = wv_unpack_dsd_fast(s, samples_l, samples_r);
-            else
+            } else {
                 ret = wv_unpack_dsd_copy(s, samples_l, samples_r);
             }
-        else
+        } else {
             ret = wv_unpack_stereo(s, &s->gb, samples_l, samples_r, avctx->sample_fmt);
+        }
         if (ret < 0)
             return ret;
     } else {
         if (got_dsd) {
-            if (dsd_mode == 3)
+            if (dsd_mode == 3) {
                 ret = wv_unpack_dsd_high(s, samples_l, NULL);
-            else if (dsd_mode == 1)
+            } else if (dsd_mode == 1) {
                 ret = wv_unpack_dsd_fast(s, samples_l, NULL);
-            else
+            } else {
                 ret = wv_unpack_dsd_copy(s, samples_l, NULL);
             }
-        else
+        } else {
             ret = wv_unpack_mono(s, &s->gb, samples_l, avctx->sample_fmt);
+        }
         if (ret < 0)
             return ret;