avformat/mov: fix 2 compile errors

Compiler: MSVC 14.35.32215
Error type: error C2059: syntax error: '}'
Related commit: 9e1ffed fate/mov: add PCM in mp4 test
d7e8643 avformat/mov: parse ISO-14496-12 ChannelLayout

Signed-off-by: Tong Wu <tong1.wu@intel.com>
Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
Reviewed-by: Haihao Xiang <haihao.xiang@intel.com>

libavformat/mov_chan.c

@@ -555,7 +555,7 @@ int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st,
 /* ISO/IEC 23001-8, 8.2 */
 static const AVChannelLayout iso_channel_configuration[] = {
     // 0: any setup
-    {},
+    {0},
 
     // 1: centre front
     AV_CHANNEL_LAYOUT_MONO,

libavformat/movenc.c

@@ -1194,7 +1194,7 @@ static int mov_write_chnl_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *tra
         ret = ff_mov_get_channel_positions_from_layout(layout,
                 speaker_pos, layout->nb_channels);
         if (ret) {
-            char buf[128] = {};
+            char buf[128] = {0};
 
             av_freep(&speaker_pos);
             av_channel_layout_describe(layout, buf, sizeof(buf));