2003-07-08 Moritz Schulte <moritz@g10code.com>

• ac.c (gcry_ac_data_copy_internal): New function, based on

gcry_ac_data_copy.
(gcry_ac_data_copy): Made public, use gcry_ac_data_copy_internal.
(gcry_ac_key_init): Use gcry_ac_data_copy_internal.