avformat/matroskadec: Reindent after the previous commit

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavformat/matroskadec.c

@@ -2810,7 +2810,7 @@ static int mkv_parse_video(MatroskaTrack *track, AVStream *st,
                            int *extradata_offset)
 {
     FFStream *const sti = ffstream(st);
-            MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
+    MatroskaTrackPlane *planes;
     int display_width_mul  = 1;
     int display_height_mul = 1;
     int ret;
@@ -2823,7 +2823,6 @@ static int mkv_parse_video(MatroskaTrack *track, AVStream *st,
     if (ret < 0)
         return ret;
 
-
     par->codec_type = AVMEDIA_TYPE_VIDEO;
     par->width      = track->video.pixel_width;
     par->height     = track->video.pixel_height;
@@ -2834,7 +2833,8 @@ static int mkv_parse_video(MatroskaTrack *track, AVStream *st,
         par->field_order = AV_FIELD_PROGRESSIVE;
 
     if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
-                mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
+        mkv_stereo_mode_display_mul(track->video.stereo_mode,
+                                    &display_width_mul, &display_height_mul);
 
     if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
         if (track->video.display_width && track->video.display_height &&
@@ -2869,6 +2869,7 @@ static int mkv_parse_video(MatroskaTrack *track, AVStream *st,
         av_dict_set_int(&st->metadata, "alpha_mode", 1, 0);
 
     /* if we have virtual track, mark the real tracks */
+    planes = track->operation.combine_planes.elem;
     for (int j = 0; j < track->operation.combine_planes.nb_elem; j++) {
         MatroskaTrack *tracks = matroska->tracks.elem;
         char buf[32];