Fix #34 Ring buffer bug

src/stats.c

@@ -6,6 +6,7 @@ static void pyfcgi_stats_add_sample(pyfcgi_stats_sample_t* samples, int sample)
 {
 	samples->samples[samples->cur] = sample;
 	samples->cur++;
+	samples->cur %= PYFCGI_STATS_SZ;
 }
 
 int pyfcgi_stats_init()