Added a missing default case in the mainboard specific configuration selection. The missing default case prevented sensor data from getting displayed on unknown Asus mainboards with NCT6779D super I/O.

<?xml version="1.0" encoding="utf-8"?>

<configuration>

  <startup>

    <supportedRuntime version="v4.0" />

    <supportedRuntime version="v2.0.50727"/>

  </startup>

</configuration>