release-0.2.9 doesn't compile on old rhel

On rhel6, building release-0.2.9 (git commit ca008906), I get

  CC     src/or/src_or_libtor_testing_a-rephist.o
src/or/rephist.c:91: error: redefinition of typedef ‘bw_array_t’
src/or/rephist.h:120: note: previous declaration of ‘bw_array_t’ was here
make[1]: *** [src/or/src_or_libtor_testing_a-rephist.o] Error 1

Looks like when we backported some stuff, we didn't backport all of the subsequent fixes on the stuff.

Here is a fix that lets it compile again (there could for sure be a better fix than this):

index dc86fad..d8f7eb2 100644
--- a/src/or/rephist.c
+++ b/src/or/rephist.c
@@ -88,7 +88,6 @@
 static void bw_arrays_init(void);
 static void predicted_ports_init(void);
 
-typedef struct bw_array_t bw_array_t;
 STATIC uint64_t find_largest_max(bw_array_t *b);
 STATIC void commit_max(bw_array_t *b);
 STATIC void advance_obs(bw_array_t *b);
diff --git a/src/or/rephist.h b/src/or/rephist.h
index c464b34..072987f 100644
--- a/src/or/rephist.h
+++ b/src/or/rephist.h
@@ -114,10 +114,10 @@ void rep_hist_log_link_protocol_counts(void);
 
 extern uint64_t rephist_total_alloc;
 extern uint32_t rephist_total_num;
+typedef struct bw_array_t bw_array_t;
 #ifdef TOR_UNIT_TESTS
 extern int onion_handshakes_requested[MAX_ONION_HANDSHAKE_TYPE+1];
 extern int onion_handshakes_assigned[MAX_ONION_HANDSHAKE_TYPE+1];
-typedef struct bw_array_t bw_array_t;
 extern bw_array_t *write_array;
 #endif

(My bwauth still runs on 0.2.9, since I'm under the impression that's the last version that works well with bwauths. That's how I noticed.)