Ticket #269: Add missing parameter to user init().

extensions/guacamole-auth-mysql/src/main/java/net/sourceforge/guacamole/net/auth/mysql/service/ProviderService.java

@@ -142,6 +142,7 @@ public class ProviderService {
         mySQLUser.init(
             user.getUser_id(),
             user.getUsername(),
+            null,
             permissionCheckService.getAllPermissions(user.getUser_id())
         );