<p><b>@MrKevinWeiss</b> commented on this pull request.</p>

<p>It looks fine and still passes tests, it seems like there is a difference in size but I guess it costs a bit to do a null check.</p>
<h3>native:</h3>
<p>master</p>
<pre><code>   text     data     bss     dec     hex filename
 190164     436  130148  320748   4e4ec RIOT/tests/gnrc_netif/bin/native/tests_gnrc_netif.elf
</code></pre>
<p>With PR</p>
<pre><code>   text     data     bss     dec     hex filename
 190284     436  130148  320868   4e564 RIOT/tests/gnrc_netif/bin/native/tests_gnrc_netif.elf
</code></pre>
<h3>samr21-xpro:</h3>
<p>master:</p>
<pre><code>   text     data     bss     dec     hex filename
  63424     152   23896   87472   155b0 RIOT/tests/gnrc_netif/bin/samr21-xpro/tests_gnrc_netif.elf
</code></pre>
<p>With PR</p>
<pre><code>   text     data     bss     dec     hex filename
  63432     152   23896   87480   155b8 RIOT/tests/gnrc_netif/bin/samr21-xpro/tests_gnrc_netif.elf
</code></pre>

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