K 10
svn:author
V 4
emax
K 8
svn:date
V 27
2009-02-16T20:04:57.819555Z
K 7
svn:log
V 278
MFC r188603

Since r188030 the error value for attach is returned, this means if kbdmux
fails to attach (possibly due to disable hints) then we get called back for
unload. Correctly handle the case where the keyboard isnt found rather than
calling panic.

Submitted by:	thompsa

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