fix #1 - saving of config files

includes/functions.mod_rewrite.php

@@ -688,12 +688,12 @@ function mr_setConfiguration($clientId, array $config) {
      
      if(file_exists($sConfigClientPath) && is_writable($sConfigClientPath)) {
          $file = $sConfigClientPath. 'config.mod_rewrite.php';
-     } else {
+     } else {         
          $file = cRegistry::getConfigValue('path', 'contenido') . cRegistry::getConfigValue('path', 'plugins') . 'cl-mod-rewrite/includes/config.mod_rewrite_' . cRegistry::getClientId() . '.php';
      }
      
     $result = file_put_contents($file, serialize($config));
-    return ($result) ? true : false;
+    return (empty($result)) ? false : true;
 }
 
 /**