fix: eventloop

[luoyue712]

相关问题：https://www.workerman.net/q/14571
在并发的时候执行了销毁操作后再重连eventloop可能为null。

#0 phar:///opt/webman.phar/vendor/workerman/workerman/src/Connection/AsyncTcpConnection.php(230): Workerman\\Connection\\AsyncTcpConnection->connect()
#1 phar:///opt/webman.phar/vendor/workerman/http-client/src/Client.php(252): Workerman\\Connection\\AsyncTcpConnection->reconnect()
#2 phar:///opt/webman.phar/vendor/workerman/http-client/src/Client.php(95): Workerman\\Http\\Client->process('tcp://interface...')
#3 [internal function]: Workerman\\Http\\Client->request('http://interfac...', Array)
#4 phar:///opt/webman.phar/app/Utils/Http/MethodInterface.php(67): call_user_func_array(Array, Array)
#5 phar:///opt/webman.phar/app/Utils/Http/MethodInterface.php(40): App\\Utils\\Http\\MethodInterface->__call('request', Array)
#6 phar:///opt/webman.phar/app/Utils/Music/NetEase/NeteaseMusic.php(160): App\\Utils\\Http\\MethodInterface->get('http://interfac...', 'ids=%5B46780547...')
#7 phar:///opt/webman.phar/app/Utils/Music/NetEase/NeteaseMusic.php(187): App\\Utils\\Music\\NetEase\\NeteaseMusic->App\\Utils\\Music\\NetEase\\{closure}(Array)
#8 phar:///opt/webman.phar/app/Utils/Music/NetEase/NeteaseMusic.php(74): App\\Utils\\Music\\NetEase\\NeteaseMusic->request()
#9 phar:///opt/webman.phar/app/v2/music/controller/NeteaseController.php(38): App\\Utils\\Music\\NetEase\\NeteaseMusic->trackInfo(467805476)
#10 phar:///opt/webman.phar/vendor/workerman/webman-framework/src/App.php(359): App\\v2\\music\\controller\\NeteaseController->index(Object(support\\Request))
#11 phar:///opt/webman.phar/vendor/linfly/annotation/src/Validate/ValidateMiddleware.php(34): Webman\\App::Webman\\{closure}(Object(support\\Request))
#12 phar:///opt/webman.phar/vendor/workerman/webman-framework/src/App.php(352): LinFly\\Annotation\\Validate\\ValidateMiddleware->process(Object(support\\Request), Object(Closure))
#13 phar:///opt/webman.phar/app/middleware/Validator.php(28): Webman\\App::Webman\\{closure}(Object(support\\Request))
#14 phar:///opt/webman.phar/vendor/workerman/webman-framework/src/App.php(352): app\\middleware\\Validator->process(Object(support\\Request), Object(Closure))
#15 phar:///opt/webman.phar/app/middleware/AccessControlTest.php(13): Webman\\App::Webman\\{closure}(Object(support\\Request))
#16 phar:///opt/webman.phar/vendor/workerman/webman-framework/src/App.php(352): App\\middleware\\AccessControlTest->process(Object(support\\Request), Object(Closure))
#17 phar:///opt/webman.phar/vendor/webman/rate-limiter/src/Limiter.php(109): Webman\\App::Webman\\{closure}(Object(support\\Request))
#18 phar:///opt/webman.phar/vendor/workerman/webman-framework/src/App.php(352): Webman\\RateLimiter\\Limiter->process(Object(support\\Request), Object(Closure))
#19 phar:///opt/webman.phar/vendor/workerman/webman-framework/src/App.php(150): Webman\\App::Webman\\{closure}(Object(support\\Request))
#20 phar:///opt/webman.phar/vendor/workerman/workerman/src/Connection/TcpConnection.php(739): Webman\\App->onMessage(Object(Workerman\\Connection\\TcpConnection), Object(support\\Request))
#21 phar:///opt/webman.phar/vendor/workerman/workerman/src/Events/Swoole.php(288): Workerman\\Connection\\TcpConnection->baseRead(Resource id #1613)
#22 [internal function]: Workerman\\Events\\Swoole->Workerman\\Events\\{closure}()
#23 {main}

[joanhey]

And here.

[luoyue712]

Thank you, the changes have been completed.