Fix unbound variable issues on AppVeyor
Fix unbound variable issues on AppVeyor

dalehenrich/smalltalkCI,hpi-swa/smalltalkCI,fniephaus/filetreeCI,hpi-swa/filetreeCI,fniephaus/filetreeCI,peteruhnak/smalltalkCI,hpi-swa/filetreeCI,hpi-swa/filetreeCI,peteruhnak/smalltalkCI,dalehenrich/smalltalkCI,peteruhnak/smalltalkCI,fniephaus/filetreeCI,hpi-swa/smalltalkCI,dalehenrich/smalltalkCI