libavcodec/wmaprodec.c:849: error: Integer Overflow L2
  ([0, 1] - 1):unsigned32.

libavcodec/wmaprodec.c:849:33: <LHS trace>
847.         for (i = 0; i < 4; i++) {
848.             if (vals[i]) {
849.                 uint32_t sign = get_bits1(&s->gb) - 1;
                                     ^
850.                 AV_WN32A(&ci->coeffs[cur_coeff], vals[i] ^ sign << 31);
851.                 num_zeros = 0;

libavcodec/wmaprodec.c:849:33: Call
847.         for (i = 0; i < 4; i++) {
848.             if (vals[i]) {
849.                 uint32_t sign = get_bits1(&s->gb) - 1;
                                     ^
850.                 AV_WN32A(&ci->coeffs[cur_coeff], vals[i] ^ sign << 31);
851.                 num_zeros = 0;

libavcodec/get_bits.h:271:1: Parameter `s->index`
  269. }
  270. 
  271. static inline unsigned int get_bits1(GetBitContext *s)
       ^
  272. {
  273.     unsigned int index = s->index;

libavcodec/get_bits.h:273:5: Assignment
  271. static inline unsigned int get_bits1(GetBitContext *s)
  272. {
  273.     unsigned int index = s->index;
           ^
  274.     uint8_t result     = s->buffer[index >> 3];
  275. #ifdef BITSTREAM_READER_LE

libavcodec/get_bits.h:276:5: Assignment
  274.     uint8_t result     = s->buffer[index >> 3];
  275. #ifdef BITSTREAM_READER_LE
  276.     result >>= index & 7;
           ^
  277.     result  &= 1;
  278. #else

libavcodec/get_bits.h:277:5: Assignment
  275. #ifdef BITSTREAM_READER_LE
  276.     result >>= index & 7;
  277.     result  &= 1;
           ^
  278. #else
  279.     result <<= index & 7;

libavcodec/get_bits.h:288:5: Assignment
  286.     s->index = index;
  287. 
  288.     return result;
           ^
  289. }
  290. 

libavcodec/wmaprodec.c:849:17: Binary operation: ([0, 1] - 1):unsigned32
847.         for (i = 0; i < 4; i++) {
848.             if (vals[i]) {
849.                 uint32_t sign = get_bits1(&s->gb) - 1;
                     ^
850.                 AV_WN32A(&ci->coeffs[cur_coeff], vals[i] ^ sign << 31);
851.                 num_zeros = 0;
