fixed CID-1397915 (coverity)
fixed CID-1397915 (coverity)

LinkedDestiny/swoole-src,tutanhamon/swoole-src,LinkedDestiny/swoole-src,AJSoft/swoole-src,LinkedDestiny/swoole-src,AJSoft/swoole-src,LinkedDestiny/swoole-src,swoole/swoole-src,swoole/swoole-src,tutanhamon/swoole-src,tutanhamon/swoole-src,LinkedDestiny/swoole-src,AJSoft/swoole-src,LinkedDestiny/swoole-src,swoole/swoole-src,swoole/swoole-src,tutanhamon/swoole-src,AJSoft/swoole-src,swoole/swoole-src,tutanhamon/swoole-src,AJSoft/swoole-src,AJSoft/swoole-src,tutanhamon/swoole-src,AJSoft/swoole-src,tutanhamon/swoole-src,swoole/swoole-src,swoole/swoole-src,LinkedDestiny/swoole-src