Minor actor tweak.

data.c

@@ -666,7 +666,7 @@ int actor_add(snac *snac, char *actor, char *msg)
 }
 
 
-int actor_get(snac *snac, char *actor, char **data)
+int actor_get(snac *snac, char *actor, d_char **data)
 /* returns an already downloaded actor */
 {
     xs *fn = _actor_fn(snac, actor);

snac.h

@@ -62,7 +62,7 @@ void unmute(snac *snac, char *actor);
 int is_muted(snac *snac, char *actor);
 
 int actor_add(snac *snac, char *actor, char *msg);
-int actor_get(snac *snac, char *actor, char **data);
+int actor_get(snac *snac, char *actor, d_char **data);
 
 void enqueue_output(snac *snac, char *actor, char *msg, int retries);