int nbytes, nbits;  if ((bits->bytePtr<<3)+bits->bitPtr+n>bits->nbBits)
if (((bits->bytePtr<<3)+bits->bitPtr+n>bits->nbBits) || bits->overflow){
void speex_bits_advance(SpeexBits *bits, int n){   int nbytes, nbits;   if ((bits->bytePtr<<3)+bits->bitPtr+n>bits->nbBits)      bits->overflow=1;   if (bits->overflow)      return;   nbytes = n >> 3;   nbits = n & 7;      bits->bytePtr += nbytes;   bits->bitPtr += nbits;      if (bits->bitPtr>7)   {      bits->bitPtr-=8;      bits->bytePtr++;   }}