add abbreviation, plus parenthesis around arithmetic in string concat

Author: mcdruid

lib/PHPGGC.php

@@ -710,6 +710,7 @@ function _parse_cmdline_arg(&$i, &$argv, &$parameters, &$options)
             'phar-jpeg' => 'pj',
             'phar-prefix' => 'pp',
             'phar-filename' => 'pf',
+            'public-properties' => 'pub',
             'new' => 'N',
             'ascii-strings' => 'a',
             'armor-strings' => 'A',

lib/PHPGGC/Enhancement/PublicProperties.php

@@ -39,7 +39,7 @@ public function remove_prefix($matches)
         $length = $matches[1];
         $reduction = strlen($matches[2]) + 2;
         $search = 's:' . $length . ':"' . chr(0) . $matches[2] . chr(0);
-        $replace = 's:' . $length - $reduction . ':"';
+        $replace = 's:' . ($length - $reduction) . ':"';
         return str_replace($search, $replace, $matches[0]);
     }
 }