git: Fix detach panic introduced by 67616947

[Markus Pfeiffer]

commit 2b970b2ffcbfc78d51b784666286c2f85a1de488
Author: Markus Pfeiffer <markus.pfeiffer at morphism.de>
Date:   Tue Oct 13 19:42:36 2015 +0100

    Fix detach panic introduced by 67616947
    
    The panic is caused by an off-by-one error in the comparison.

Summary of changes:
 sys/bus/u4b/controller/usb_controller.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/2b970b2ffcbfc78d51b784666286c2f85a1de488


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