[riot-notifications] [RIOT-OS/RIOT] drivers/enc28j60: Allow sending with empty chunks (#11214)

Marian Buschsieweke notifications at github.com
Wed Mar 20 10:03:46 CET 2019

### Contribution description
This commit allows `netdev_driver_t::send()` of `enc28j60` to be passed an `iolist_t` containing one or more empty elements.

### Testing procedure
Run `examples/gnrc_networking` and try if `udp send ff02::1 1337 ""` works now. It shouldn't with master. Also check if `ping6` to make sure no regression is introduces.

### Issues/PRs references
Fixes https://github.com/RIOT-OS/RIOT/issues/11163 for the `enc28j60`.
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-- Commit Summary --

  * drivers/enc28j60: Allow sending with empty chunks

-- File Changes --

    M drivers/enc28j60/enc28j60.c (14)

-- Patch Links --


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