title: How to fix "error: no previous declaration for void awn::vala_array_destroy"?
body: <p>I'm on Ubuntu 13.04 32 platform. I'm trying to compile awn with latest vala. I get following error message.</p>
  
  <pre><code>vala-utils.cc: In function 'void awn::vala_array_destroy(gpointer, gint, GDestroyNotify)':
  vala-utils.cc:358:6: error: no previous declaration for 'void   awn::vala_array_destroy(gpointer, gint, GDestroyNotify)' [-Werror=missing-declarations]
  cc1plus: some warnings being treated as errors
  </code></pre>
  
  <p>How can I fix that error?</p>