staging: ozwpan: prevent a couple of underflows
The underflow in OZ_DATA_F_ISOC_FIXED seems not harmful, but this patch is a clean up and makes my static checker a bit happier. The underflow in OZ_VENDOR_CLASS_RSP seems like it could result in memory corruption. Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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