Fix language lookup bug in geshi

Author: xiphux

include/controller/Controller_GraphData.class.php

@@ -106,11 +106,10 @@ protected function LoadData()
 
 				if (!empty($lang) && ($lang !== 'Other')) {
 
-					/** buggy ? and uncatchable (error 500, no logs)
+					/* if you have a bug here, check the "match the langname" regexp */
 					$fulllang = $geshi->get_language_fullname($lang);
 					if (!empty($fulllang))
 						$lang = $fulllang;
-					**/
 				}
 
 				if (isset($data[$lang])) {

lib/geshi/geshi.php

@@ -808,7 +808,7 @@ function get_language_fullname($language)
         }
 
         // match the langname
-        if (!preg_match('/\'LANG_NAME\'\s*=>\s*\'((?:[^\']|\\\')+)\'/', $data, $matches)) {
+        if (!preg_match("/'LANG_NAME'\s*=>\s*'(.+|(?:\\')+)'/", $data, $matches)) {
             $this->error = sprintf('Geshi::get_lang_fullname(%s): Regex can not detect language', $language);
             return false;
         }