Add missing 1994/shapiro/shapiro.alt.c

With a tip from Leo the missing alt code has been added to the website.

Ta, Leo (🦁⭐️🌌)!

thanks-for-help.html

@@ -2241,6 +2241,9 @@ assumed that <code>getc()</code> will return <code>-1</code> on EOF or error, no
 where <code>EOF != -1</code> it could result in an infinite loop.</p>
 <p>For an interesting problem that occurred here and what was done to solve it,
 check <a href="bugs.html#1994_shapiro">1994/shapiro in bugs.html</a>.</p>
+<p>Cody also provided the missing
+<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1994/shapiro/shapiro.alt.c">shapiro.alt.c</a> file, found by Leo.
+Thanks Leo!</p>
 <p>Jump to: <a href="#">top</a></p>
 <div id="1994_smr">
 <h2 id="winning-entry-1994smr">Winning entry: <a href="1994/smr/index.html">1994/smr</a></h2>