lavc/mpegvideo.h: revert unnecessary changes

class: C++ keyword, but MythTV does not include this file

removed parentheses resulted from a complier warning about
"unnecessary parentheses"

mythtv/external/FFmpeg/libavcodec/mpegvideo.h

@@ -79,7 +79,7 @@
  * MpegEncContext.
  */
 typedef struct MpegEncContext {
-    AVClass *clss;
+    AVClass *class;
 
     int y_dc_scale, c_dc_scale;
     int ac_pred;
@@ -253,8 +253,8 @@ typedef struct MpegEncContext {
     int16_t (*b_direct_mv_table)[2];     ///< MV table (1MV per MB) direct mode B-frame encoding
     int16_t (*p_field_mv_table[2][2])[2];   ///< MV table (2MV per MB) interlaced P-frame encoding
     int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced B-frame encoding
-    uint8_t *p_field_select_table[2];
-    uint8_t *b_field_select_table[2][2];
+    uint8_t (*p_field_select_table[2]);
+    uint8_t (*b_field_select_table[2][2]);
     int motion_est;                      ///< ME algorithm
     int me_penalty_compensation;
     int me_pre;                          ///< prepass for motion estimation