* packet.h, main.h, sig-check.c (signature_check2, check_key_signature2,

do_check): If ret_pk is set, fill in the pk used to verify the signature.
Change all callers in getkey.c, mainproc.c, and sig-check.c.

* keylist.c (list_keyblock_colon): Use the ret_pk from above to put the
fingerprint of the signing key in "sig" records during a --with-colons
--check-sigs.  This requires --no-sig-cache as well since we don't cache
fingerprints.

g10/getkey.c

@@ -1604,7 +1604,7 @@ merge_selfsigs_main( KBNODE keyblock, int *r_revoked )
                        ultimate trust flag.  */
 		    if(get_pubkey_fast(ultimate_pk,sig->keyid)==0
 		       && check_key_signature2(keyblock,k,ultimate_pk,
-					       NULL,&dummy,&dum2)==0
+					       NULL,NULL,&dummy,&dum2)==0
 		       && get_ownertrust(ultimate_pk)==TRUST_ULTIMATE)
 		      {
 			free_public_key(ultimate_pk);