Dag-Erling Smørgrav bbb2703b4f Simplify expand_number() by combining the (unrolled) loop with the
switch.  Since expand_number() does not accept negative numbers, switch
from int64_t to uint64_t; this makes it easier to check for overflow.

MFC after:	3 weeks
2010-08-14 14:34:36 +00:00
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