wmi: check find_guid() return value to prevent oops
Signed-off-by: Paul Rolland <rol@as2917.net> Signed-off-by: Len Brown <len.brown@intel.com>
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fda11e61
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Signed-off-by: Paul Rolland <rol@as2917.net> Signed-off-by: Len Brown <len.brown@intel.com>