fix core dump on testing script (not libinjection)
fix core dump on testing script (not libinjection)

ppliu1979/libinjection,ppliu1979/libinjection,fengjian/libinjection,ppliu1979/libinjection,fengjian/libinjection,dijkstracula/libinjection,fengjian/libinjection,dijkstracula/libinjection,dijkstracula/libinjection,dijkstracula/libinjection,fengjian/libinjection,ppliu1979/libinjection,fengjian/libinjection,ppliu1979/libinjection,fengjian/libinjection,ppliu1979/libinjection,dijkstracula/libinjection,fengjian/libinjection,dijkstracula/libinjection