Fix bug 191396.  Don't generate SEC_ERROR_LIBRARY_FAILURE unnecessarily while doing dsa signatures.
Fix bug 191396.  Don't generate SEC_ERROR_LIBRARY_FAILURE unnecessarily
while doing dsa signatures.

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