bugfix：编辑角色权限报错500

ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/service/impl/SysRoleServiceImpl.java

@@ -499,6 +499,9 @@ public class SysRoleServiceImpl implements ISysRoleService {
                 return;
             }
             LoginUser loginUser = LoginHelper.getLoginUser(token);
+            if (loginUser == null || loginUser.getRoles() == null) {
+                return;
+            }
             if (loginUser.getRoles().stream().anyMatch(r -> r.getRoleId().equals(roleId))) {
                 try {
                     StpUtil.logoutByTokenValue(token);