[Buildroot] busybox stty writing to stderr

[David Laight]

This is with the previous release - so might have been changed.

If I run 'stty -a' on a serial console I get an error
message "stty: standard input\n" written to stderr.

If I redirect stdout I get the error message
"stty: standard input: Inappropriate ioctl for device\n"

Both are written between the write of "speed 115200 baud;"
and " line = 0\n".

I suspect they are related to TIOCGWINSZ failing.

	David

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