Use realloc when paused in Curl_client_write

      /* major internal confusion */

      return CURLE_RECV_ERROR;

    DEBUGASSERT(data->state.tempwrite);

    /* figure out the new size of the data to save */

    newlen = len + data->state.tempwritesize;

    /* allocate the new memory area */

    newptr = malloc(newlen);

    newptr = realloc(data->state.tempwrite, newlen);

    if(!newptr)

      return CURLE_OUT_OF_MEMORY;

    /* copy the previously held data to the new area */

    memcpy(newptr, data->state.tempwrite, data->state.tempwritesize);

    /* copy the new data to the end of the new area */

    memcpy(newptr + data->state.tempwritesize, ptr, len);

    /* free the old data */

    free(data->state.tempwrite);

    /* update the pointer and the size */

    data->state.tempwrite = newptr;

    data->state.tempwritesize = newlen;