[PATCH 1/3] New function to avoid duplicate code in upcomming commits

[Werner Sembach]

Moves some checks that later will be performed 2 times to an own fuction. This
avoids duplicate code later on.

Signed-off-by: Werner Sembach <wse@xxxxxxxxxxxxxxxxxxx>
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PS.: I have no idea why git send-email is messing up this timestamp in "From" below.