Fix support for pk-zip compressed figlet font files

Summary: The change from https://secure.phabricator.com/D21860 introduced a PHP error due to an invalid variable reference (`zip` instead of `$zip`). This fixes that issue as well as confirms that pk-zip compressed figlet font files can continue to be used/loaded.

Test Plan:
1. I ensured I had numerous figlet font files installed in `resources/figlet/custom` and used `file` to verify that `univers.flf` and `puffy.flf` are pk-zip archives.
2. With this change applied I added a comment with `figlet(font=univers){{{hello}}}` and verified that the comment used the univers font to render `hello`, and like-wise with the `puffy` font.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D21861

Author: neandrake

externals/pear-figlet/Text/Figlet.php

@@ -141,13 +141,15 @@ function loadFont($filename, $loadgerman = true)
             /* ZIPed font */
             if (fread($fp, 2) == 'PK') {
                 fclose($fp);
+
                 $zip = new ZipArchive();
                 $open_result = $zip->open($filename, ZipArchive::RDONLY);
                 if ($open_result !== true) {
                     return self::raiseError('Cannot open figlet font file ' .
                         $filename . ', got error: ' . $open_result, 2);
                 }
-                $name = zip->getNameIndex(0);
+
+                $name = $zip->getNameIndex(0);
                 $zip->close();
 
                 if (!($fp = fopen('zip://' . realpath($filename) . '#' . $name, 'rb'))) {