Merge "Avoid potential buffer overrun in bd2str caused by signed char"

char *bd2str(const bt_bdaddr_t *bdaddr, bdstr_t *bdstr)

{

    char *addr = (char *) bdaddr->address;

    const uint8_t *addr = bdaddr->address;

    sprintf((char*)bdstr, "%02x:%02x:%02x:%02x:%02x:%02x",

                       (int)addr[0],(int)addr[1],(int)addr[2],

                       (int)addr[3],(int)addr[4],(int)addr[5]);

    snprintf((char*)bdstr, sizeof(*bdstr), "%02x:%02x:%02x:%02x:%02x:%02x",

             addr[0], addr[1], addr[2],

             addr[3], addr[4], addr[5]);

    return (char *)bdstr;

}