Fix #1705 : MySQL connection might be lost after long operations

lib/classes/databox.php

@@ -1009,6 +1009,7 @@ class databox extends base
                 unset($e);
             }
         }
+        $stmt->closeCursor();
 
         $user->ACL()->give_access_to_base($base_ids);
         foreach ($base_ids as $base_id) {
@@ -1022,8 +1023,6 @@ class databox extends base
             );
         }
 
-        $stmt->closeCursor();
-
         return $this;
     }