title: How to free memory allocated by ImageMagick GetImageHistogram()?
body: <p>I'm using <code>ColorPacket *GetImageHistogram(const Image *image, ...)</code> to extract an histogram. I see IM sources and found, that GetImageHistogram allocates memory via:</p>
  
  <pre><code>  histogram=(ColorPacket *) AcquireQuantumMemory((size_t) cube_info-&gt;colors,
      sizeof(*histogram));
  </code></pre>
  
  <p>How should I free this memory?</p>