title: Eclipse CDT "Symbol NULL could not be resolved"
body: <p>I just installed <code>Eclipse</code> <code>CDT</code> with <code>MinGW</code>.
  All the environment variables are set, includes, etc. Tried running a hello world and everything seems to be fine.</p>
  
  <p>I tried loading a <code>C</code> project that I had before in my computer, it seems to load everything fine, yet I get the following error with the <code>NULL</code> symbol :</p>
  
  <pre><code>Symbol 'NULL' could not be resolved
  </code></pre>
  
  <p>Any insights? Thanks!</p>