Bug 1011090: Make CERTDB_* constants in pcertt.h unsigned for consistency with certdb.h. r=briansmith.
Bug 1011090: Make CERTDB_* constants in pcertt.h unsigned for
consistency with certdb.h. r=briansmith.

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