which was introduced in 10b4da63.

Since 1e47614c, only
convertTwipToMM100Unsigned() ignores large values, which presumably
was not the intention. At least commit message suggests so.

So, move the check back to convertTwipToMM100().

Change-Id: I17040f1987e24789b9de39a837d9f7ecaed520fb