static int find_tag(ByteIOContext *pb, int tag1)
static int find_tag(ByteIOContext *pb, UINT32 tag1)
static int find_tag(ByteIOContext *pb, int tag1){    unsigned int tag;    int size;    for(;;) {        if (url_feof(pb))            return -1;        tag = get_le32(pb);        size = get_le32(pb);        if (tag == tag1)            break;        url_fseek(pb, size, SEEK_CUR);    }    if (size < 0)        size = 0x7fffffff;    return size;}