test_input_stream: don't test I/O after EOF
test_input_stream: don't test I/O after EOF

Because it's UB and depends of accesses.

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc