Fix remaining case of circpathbias inspecting entryguard internals

src/or/circpathbias.c

@@ -1175,7 +1175,7 @@ pathbias_count_circs_in_states(entry_guard_t *guard,
     if (ocirc->path_state >= from &&
         ocirc->path_state <= to &&
         pathbias_should_count(ocirc) &&
-        fast_memeq(guard->identity,
+        fast_memeq(entry_guard_get_rsa_id_digest(guard),
                    ocirc->cpath->extend_info->identity_digest,
                    DIGEST_LEN)) {
       log_debug(LD_CIRC, "Found opened circuit %d in path_state %s",

src/or/entrynodes.c

@@ -177,6 +177,13 @@ entry_guard_describe(const entry_guard_t *guard)
   return buf;
 }
 
+/** Return <b>guard</b>'s 20-byte RSA identity digest */
+const char *
+entry_guard_get_rsa_id_digest(const entry_guard_t *guard)
+{
+  return guard->identity;
+}
+
 /** Check whether the entry guard <b>e</b> is usable, given the directory
  * authorities' opinion about the router (stored in <b>ri</b>) and the user's
  * configuration (in <b>options</b>). Set <b>e</b>->bad_since

src/or/entrynodes.h

@@ -104,6 +104,7 @@ int num_live_entry_guards(int for_directory);
 
 const node_t *entry_guard_find_node(const entry_guard_t *guard);
 void entry_guard_mark_bad(entry_guard_t *guard);
+const char *entry_guard_get_rsa_id_digest(const entry_guard_t *guard);
 const char *entry_guard_describe(const entry_guard_t *guard);
 
 #ifdef ENTRYNODES_PRIVATE