greybus: loopback_test: fix warning about signed/unsigned comparison

We read an int, don't treat it as a unsigned value, especially when
comparing it to a signed value.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman 2015-12-15 13:55:05 -08:00
commit 6bfff1dcb2