Fix to return a negative error code from the error handling
case instead of 0, as returned elsewhere in this function.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: NSjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>