check if args exist before accessing binarypath
check if args exist before accessing binarypath

tomzhang/mtools,parkhyeonghwa/mtools,corymintz/mtools,devkev/mtools,parkhyeonghwa/mtools,devkev/mtools,gormanb/mtools,aerrami/mtools,ces0712/mtools,aerrami/mtools,yaowenqiang/mtools,parkhyeonghwa/mtools,yaowenqiang/mtools,corymintz/mtools,tomzhang/mtools,corymintz/mtools,ces0712/mtools,gormanb/mtools,ces0712/mtools,tomzhang/mtools,rueckstiess/mtools,devkev/mtools,yaowenqiang/mtools,rueckstiess/mtools,gormanb/mtools,aerrami/mtools