minor fix on module file extension
minor fix on module file extension

cderici/pycket,magnusmorton/pycket,cderici/pycket,pycket/pycket,samth/pycket,samth/pycket,cderici/pycket,magnusmorton/pycket,pycket/pycket,samth/pycket,magnusmorton/pycket,pycket/pycket