title: C: how to convert foreach_point(t->board) to for loop?
body: <p>I need to separate values with a comma in each case but the last.
  Various posts suggest to use <code>for</code> instead of <code>foreach</code>, 
  but as this is a patch, and I don't use C, how can I convert 
  <code>foreach_point(t-&gt;board)</code>  to a <code>for</code> loop?</p>