[project @ 2000-05-12 20:01:28 by panne]

Fixed bug in integerTo{Word,Int}64zh primops: They used the number of
allocated *words* to determine size of an integer, but this is wrong
due to normalization. When e.g. two large numbers with different sign,
but approximately same absolute value are added, MPN_NORMALIZE cuts
down the *size*, but the allocation stays the same. Simple fix: Use
size parameter of macros directly. Easier and more correct! :-)