vformat/wtvenc: fix doxygen comments

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/wtvenc.c

@@ -87,10 +87,10 @@ typedef struct {
 typedef struct {
     int64_t timeline_start_pos;
     WtvFile file[WTV_FILES];
-    int64_t serial;         /** chunk serial number */
-    int64_t last_chunk_pos; /** last chunk position */
-    int64_t last_timestamp_pos; /** last timestamp chunk position */
-    int64_t first_index_pos;    /** first index_chunk position */
+    int64_t serial;         /**< chunk serial number */
+    int64_t last_chunk_pos; /**< last chunk position */
+    int64_t last_timestamp_pos; /**< last timestamp chunk position */
+    int64_t first_index_pos;    /**< first index_chunk position */
 
     WtvChunkEntry index[MAX_NB_INDEX];
     int nb_index;