title: R waffle package not working as expected when there are more than 8 categories
body: <p>Earlier this week I had a class of 30 students generate a waffle chart as part of a homework assignment using the waffle package. None reported any issues.</p>
  <p>In making the answer key, I found that it is no longer working (also confirmed by a delinquent student), making me think this is a brand-new issue.</p>
  <p>In the minimal example below, only the first works - there seems to be a cap of 8 categories, unless colors are specified as in the 4th case.</p>
  <pre><code>library(waffle)
  
  parts &lt;- c(1:8)
  waffle(parts, rows=8)
  
  parts &lt;- c(1:9)
  waffle(parts, rows=8)
  
  parts &lt;- c(1:10)
  waffle(parts, rows=8)
  
  parts &lt;- c(1:10)
  waffle(parts, rows=8, colors=c(1:10))
  </code></pre>