make histograms work with the graphite backend

backends/graphite.js

@@ -117,10 +117,11 @@ var flush_stats = function graphite_flush(ts, metrics) {
         var namespace = timerNamespace.concat(key);
         var the_key = namespace.join(".");
 
-        if (typeof(timer_data_key) === 'string') {
+        if (typeof(timer_data[key][timer_data_key]) === 'number') {
           statString += the_key + '.' + timer_data_key + ' ' + timer_data[key][timer_data_key] + ts_suffix;
         } else {
           for (timer_data_sub_key in timer_data[key][timer_data_key]) {
+            l.log(timer_data[key][timer_data_key][timer_data_sub_key].toString());
             statString += the_key + '.' + timer_data_key + '.' + timer_data_sub_key + ' ' +
                           timer_data[key][timer_data_key][timer_data_sub_key] + ts_suffix;
           }

stats.js

@@ -54,7 +54,7 @@ function flushMetrics() {
     counter_rates: counter_rates,
     timer_data: timer_data,
     pctThreshold: pctThreshold,
-    histogram: config.histogram
+    histogram: conf.histogram
   }
 
   // After all listeners, reset the stats
@@ -124,7 +124,7 @@ config.configFile(process.argv[2], function (config, oldConfig) {
   bad_lines_seen = prefixStats + ".bad_lines_seen";
   packets_received = prefixStats + ".packets_received";
 
-  //now set to zero so we can increment them 
+  //now set to zero so we can increment them
   counters[bad_lines_seen] = 0;
   counters[packets_received] = 0;