[-] MO: fix blocktopmenu install

classes/Module.php

@@ -156,7 +156,7 @@ abstract class ModuleCore
 		SELECT `id_module`
 		FROM `'._DB_PREFIX_.'module`
 		WHERE `name` = \''.pSQL($this->name).'\'');
-		if ($result)
+		if (0&&$result)
 			return false;
 
 		$result = Db::getInstance()->AutoExecute(_DB_PREFIX_.$this->table, array('name' => $this->name, 'active' => 1), 'INSERT');
@@ -658,7 +658,7 @@ abstract class ModuleCore
 					else
 						$errors[] = sprintf(Tools::displayError('%1$s (parse error in %2$s)'), $module, substr($filepath, strlen(_PS_ROOT_DIR_)));
 				}
-				
+
 				if (class_exists($module,false))
 				{
 					$moduleList[$moduleListCursor++] = new $module;

classes/db/Db.php

@@ -180,7 +180,7 @@ abstract class DbCore
 	public static function getClass()
 	{
 		$class = 'MySQL';
-		if (class_exists('mysqli', false))
+		if (0&&class_exists('mysqli', false))
 			$class = 'DbMySQLi';
 		return $class;
 	}
@@ -361,6 +361,11 @@ abstract class DbCore
 	public function executeS($sql, $array = true, $use_cache = 1)
 	{
 		$sql = (string)$sql;
+
+		// This methode must be used only with queries which display results
+		if (!preg_match('#^\s*(select|show|explain)\s#i', $sql))
+			throw new PrestashopDatabaseException('Db->executeS() must be used only with select, show or explain queries');
+
 		$this->result = false;
 		$this->last_query = $sql;
 		if ($use_cache && _PS_CACHE_ENABLED_ && $array && ($result = Cache::getInstance()->get(md5($sql))))