fix swoole_http2_free implicit declaration
fix swoole_http2_free implicit declaration

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