libavcodec/h263.c:487: error: Buffer Overrun L3
  Offset added: 24 Size: [0, +oo].

libavcodec/h263.c:484:1: <Length trace>
482. }
483. 
484. static inline void restore_ac_coeffs(MpegEncContext * s, DCTELEM block[6][64], int dir[6], uint8_t *st[6], int zigzag_last_index[6])
     ^
485. {
486.     int i, n;

libavcodec/h263.c:484:1: Parameter `s->block_last_index[*]`
482. }
483. 
484. static inline void restore_ac_coeffs(MpegEncContext * s, DCTELEM block[6][64], int dir[6], uint8_t *st[6], int zigzag_last_index[6])
     ^
485. {
486.     int i, n;

libavcodec/h263.c:487:5: Array access: Offset added: 24 Size: [0, +oo]
485. {
486.     int i, n;
487.     memcpy(s->block_last_index, zigzag_last_index, sizeof(int)*6);
         ^
488. 
489.     for(n=0; n<6; n++){
