Fix double free introduced in rev 1.54.  r=wtc.  bug 230774. Bug occurs only in NSS utilities that import base64 encoded files, e.g. with the -a option.
Fix double free introduced in rev 1.54.  r=wtc.  bug 230774.
Bug occurs only in NSS utilities that import base64 encoded files, e.g.
with the -a option.

nmav/nss,ekr/nss-old,nmav/nss,nmav/nss,nmav/nss,ekr/nss-old,ekr/nss-old,nmav/nss,ekr/nss-old,nmav/nss,ekr/nss-old,ekr/nss-old,ekr/nss-old,nmav/nss