Add check against NullPointerException
Add check against NullPointerException

tejassaoji/RhinoCoarseTainting,Pilarbrist/rhino,tntim96/rhino-apigee,sam/htmlunit-rhino-fork,swannodette/rhino,swannodette/rhino,Angelfirenze/rhino,Angelfirenze/rhino,swannodette/rhino,tntim96/rhino-jscover-repackaged,sainaen/rhino,AlexTrotsenko/rhino,lv7777/egit_test,lv7777/egit_test,tejassaoji/RhinoCoarseTainting,tejassaoji/RhinoCoarseTainting,tntim96/rhino-apigee,tntim96/htmlunit-rhino-fork,qhanam/rhino,tuchida/rhino,tntim96/htmlunit-rhino-fork,rasmuserik/rhino,qhanam/rhino,Pilarbrist/rhino,Angelfirenze/rhino,Distrotech/rhino,ashwinrayaprolu1984/rhino,rasmuserik/rhino,tntim96/rhino-apigee,tejassaoji/RhinoCoarseTainting,sainaen/rhino,sainaen/rhino,tuchida/rhino,sainaen/rhino,ashwinrayaprolu1984/rhino,sam/htmlunit-rhino-fork,lv7777/egit_test,tejassaoji/RhinoCoarseTainting,sam/htmlunit-rhino-fork,swannodette/rhino,tejassaoji/RhinoCoarseTainting,tuchida/rhino,sam/htmlunit-rhino-fork,lv7777/egit_test,Pilarbrist/rhino,Angelfirenze/rhino,Angelfirenze/rhino,Pilarbrist/rhino,tuchida/rhino,tuchida/rhino,qhanam/rhino,jsdoc3/rhino,tuchida/rhino,sainaen/rhino,swannodette/rhino,sam/htmlunit-rhino-fork,ashwinrayaprolu1984/rhino,sam/htmlunit-rhino-fork,Pilarbrist/rhino,swannodette/rhino,tntim96/rhino-jscover-repackaged,AlexTrotsenko/rhino,tntim96/rhino-jscover,ashwinrayaprolu1984/rhino,lv7777/egit_test,sainaen/rhino,tejassaoji/RhinoCoarseTainting,lv7777/egit_test,InstantWebP2P/rhino-android,AlexTrotsenko/rhino,qhanam/rhino,ashwinrayaprolu1984/rhino,jsdoc3/rhino,AlexTrotsenko/rhino,AlexTrotsenko/rhino,InstantWebP2P/rhino-android,lv7777/egit_test,Pilarbrist/rhino,ashwinrayaprolu1984/rhino,jsdoc3/rhino,AlexTrotsenko/rhino,tntim96/rhino-jscover,Angelfirenze/rhino,AlexTrotsenko/rhino,ashwinrayaprolu1984/rhino,swannodette/rhino,sam/htmlunit-rhino-fork,tuchida/rhino,Angelfirenze/rhino,Pilarbrist/rhino,Distrotech/rhino,sainaen/rhino