title: eclipse build problem
body: <p>when I try to build my Eclipse project, I get the following error message:</p>
  
  <pre><code>The type org.eclipse.swt.widgets.Composite cannot be resolved. It is indirectly referenced from required .class files
  </code></pre>
  
  <p>Can anybody help me to solve this problem? The Java-Build-Path contains the Plug-in-Dependencies-Library and org.eclipse.swt... is listed there.</p>
  
  <p>I didn't have the problem last week (though nothing should have changed in the meantime).
  But it's not the first time that I get this typ of error...</p>