Fixing getActiveElement for language bindings that pass null parameters.
Fixing getActiveElement for language bindings that pass null parameters.

xsyntrex/ghostdriver,amikey/ghostdriver,testingbot/ghostdriver,acarpe/ghostdriver,testingbot/ghostdriver,kuahyeow/ghostdriver,Lochlan/ghostdriver,Vitallium/ghostdriver,asolntsev/ghostdriver,HelioGuilherme66/ghostdriver,yuanzhen/ghostdriver,detro/ghostdriver,HelioGuilherme66/ghostdriver,kuahyeow/ghostdriver,treejames/ghostdriver,jesg/ghostdriver,jesg/ghostdriver,51ttw/ghostdriver,Vitallium/ghostdriver,Lochlan/ghostdriver,antoinereyt/ghostdriver,xsyntrex/ghostdriver,antoinereyt/ghostdriver,stevenliuit/ghostdriver,stevenliuit/ghostdriver,jesg/ghostdriver,yuanzhen/ghostdriver,treejames/ghostdriver,amikey/ghostdriver,asolntsev/ghostdriver,testingbot/ghostdriver,acarpe/ghostdriver,51ttw/ghostdriver,detro/ghostdriver,HelioGuilherme66/ghostdriver,detro/ghostdriver,jesg/ghostdriver,testingbot/ghostdriver