libdrizzle fails to connect to uds

[Eric Bergen]

A successful connect() call when connecting to a unix domain socket results in an infinite loop of calls back to drizzle_state_connect(). In conn.cc I had to add a drizzle_state_pop(con) to get a successful uds connection. I'm not sure if this is the correct way to fix it but it seems to work.

    do {
      if (connect(con->fd, (struct sockaddr *)&servAddr, sizeof(servAddr)) < 0)
      {
        switch (errno)
        {
        case EINPROGRESS:
        case EALREADY:
        case EINTR:
          continue;

        case EISCONN: /* We were spinning waiting on connect */
          {
            break;
          }

        default:
          con->drizzle->last_errno= errno;
          return DRIZZLE_RETURN_COULD_NOT_CONNECT;
        }
      }
      //This else added by eric to get a successful connection
      else
      {
        drizzle_state_pop(con);
        break;
      }
    } while (0);