title: Move pointer one byte
body: <p>I want to move a pointer forward one byte.
  But I get this error:</p>
  
  <pre><code>lvalue required as increment operand
  </code></pre>
  
  <p>With this code:</p>
  
  <pre><code>int **test = 0;
  ((char *) *test)++;
  </code></pre>
  
  <p>But it is fine with this:</p>
  
  <pre><code>int **test = 0;
  char **t2 = (char **) test;
  (*t2)++;
  </code></pre>
  
  <p>How do I do the latter concisely?</p>