libavcodec/h261dec.c:113: error: Integer Overflow L2
  (16 - [`h->s.bc.bits_left`, `h->s.bc.bits_left` + 32]):unsigned32 by call to `bitstream_skip`.

libavcodec/h261dec.c:101:1: Parameter `h->s.bc.bits_left`
 99.  * @return <0 if an error occurred
100.  */
101. static int h261_decode_gob_header(H261Context *h)
     ^
102. {
103.     unsigned int val;

libavcodec/h261dec.c:108:15: Call
106.     if (!h->gob_start_code_skipped) {
107.         /* Check for GOB Start Code */
108.         val = bitstream_peek(&s->bc, 15);
                   ^
109.         if (val)
110.             return -1;

libavcodec/bitstream.h:215:1: Parameter `n`
  213. /* Return n bits from the buffer, but do not change the buffer state.
  214.  * n has to be in the 0-32 range. */
  215. static inline unsigned bitstream_peek(BitstreamContext *bc, unsigned n)
       ^
  216. {
  217.     if (n > bc->bits_left)

libavcodec/h261dec.c:113:9: Call
111. 
112.         /* We have a GBSC */
113.         bitstream_skip(&s->bc, 16);
             ^
114.     }
115. 

libavcodec/bitstream.h:241:1: <LHS trace>
239. 
240. /* Skip n bits in the buffer. */
241. static inline void bitstream_skip(BitstreamContext *bc, unsigned n)
     ^
242. {
243.     if (n <= bc->bits_left)

libavcodec/bitstream.h:241:1: Parameter `n`
  239. 
  240. /* Skip n bits in the buffer. */
  241. static inline void bitstream_skip(BitstreamContext *bc, unsigned n)
       ^
  242. {
  243.     if (n <= bc->bits_left)

libavcodec/bitstream.h:241:1: <RHS trace>
239. 
240. /* Skip n bits in the buffer. */
241. static inline void bitstream_skip(BitstreamContext *bc, unsigned n)
     ^
242. {
243.     if (n <= bc->bits_left)

libavcodec/bitstream.h:241:1: Parameter `n`
  239. 
  240. /* Skip n bits in the buffer. */
  241. static inline void bitstream_skip(BitstreamContext *bc, unsigned n)
       ^
  242. {
  243.     if (n <= bc->bits_left)

libavcodec/bitstream.h:246:9: Binary operation: (16 - [h->s.bc.bits_left, h->s.bc.bits_left + 32]):unsigned32 by call to `bitstream_skip` 
  244.         skip_remaining(bc, n);
  245.     else {
  246.         n -= bc->bits_left;
               ^
  247.         skip_remaining(bc, bc->bits_left);
  248.         if (n >= 64) {
