Pass proper config values

Author: Hlavtox

ps_emailsubscription.php

@@ -153,8 +153,8 @@ public function install()
             $conditions[(int) $lang['id_lang']] = $this->getConditionFixtures($lang);
         }
         Configuration::updateValue('NW_CONDITIONS', $conditions, true);
-        Configuration::updateValue('NW_VERIFICATION_EMAIL', false);
-        Configuration::updateValue('NW_CONFIRMATION_EMAIL', false);
+        Configuration::updateValue('NW_VERIFICATION_EMAIL', 0);
+        Configuration::updateValue('NW_CONFIRMATION_EMAIL', 0);
         Configuration::updateValue('NW_VOUCHER_CODE', '');
 
         return Db::getInstance()->execute('