title: "-Weverything" puts a "Varargs argument missing, but tolerated as an extension" warning at each NSAssert
body: <p>After I added the new <code>-Weverything</code> to Clang's <code>other warning flags</code>, I started getting this warning for all of my <strong>NSAsserts</strong>:</p>
  
  <pre><code>Varargs argument missing, but tolerated as an extension
  </code></pre>
  
  <p>How can I fix this or, alternatively, suppress this warning?</p>