Remove useless atoi(3), previous strspn(3) makes sure that a_name->val is a number. This also allow pw user show to work as expected.
Remove useless atoi(3), previous strspn(3) makes sure that a_name->val is a
number.
This also allow pw user show to work as expected.

PR:		bin/172112
Submitted by:	"Ilya A. Arkhipov" <rum1cro@yandex.ru>
MFC after:	1 month

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