Fix CLOSE method on MY-FILE-STREAM in the stream test suite.
Fix CLOSE method on MY-FILE-STREAM in the stream test suite.

Signed-off-by: Stelian Ionescu <c3ad3339b5ffc3418808e627431a7cb60f2334f3@common-lisp.net>

attila-lendvai/iolib,dkochmanski/iolib,attila-lendvai/iolib,vsedach/iolib-simple-mux,lispnik/iolib,shamazmazum/iolib,sionescu/iolib,lispnik/iolib,deadtrickster/iolib,shamazmazum/iolib,sionescu/iolib,deadtrickster/iolib,deadtrickster/iolib,dkochmanski/iolib,sionescu/iolib,vsedach/iolib-simple-mux,dkochmanski/iolib,shamazmazum/iolib,lispnik/iolib,tiago4orion/iolib,tiago4orion/iolib,tiago4orion/iolib,attila-lendvai/iolib