fix on non-full stats routers (thx zzz)

doh

router/java/src/net/i2p/router/RouterVersion.java

@@ -18,7 +18,7 @@ public class RouterVersion {
     /** deprecated */
     public final static String ID = "Monotone";
     public final static String VERSION = CoreVersion.VERSION;
-    public final static long BUILD = 21;
+    public final static long BUILD = 22;
 
     /** for example "-test" */
     public final static String EXTRA = "-rc";

router/java/src/net/i2p/router/tasks/CoalesceStatsEvent.java

@@ -39,7 +39,7 @@ public class CoalesceStatsEvent implements SimpleTimer.TimedEvent {
         ctx.statManager().createRateStat("router.activeSendPeers", "How many peers we've sent to this minute", "Throttle", new long[] { 60*1000, 5*60*1000, 60*60*1000 });
         ctx.statManager().createRequiredRateStat("router.fastPeers", _x("Known fast peers"), "Throttle", new long[] { 5*60*1000, 60*60*1000 });
         ctx.statManager().createRateStat("router.integratedPeers", _x("Known integrated (floodfill) peers"), "Throttle", new long[] { 60*1000, 5*60*1000, 60*60*1000 });
-        ctx.statManager().createRateStat("router.tunnelBacklog", _x("Size of tunnel acceptor backlog"), "Tunnels", new long[] { 60*1000, 5*60*1000, 60*60*1000 });
+        ctx.statManager().createRequiredRateStat("router.tunnelBacklog", _x("Size of tunnel acceptor backlog"), "Tunnels", new long[] { 60*1000, 5*60*1000, 60*60*1000 });
         _maxMemory = Runtime.getRuntime().maxMemory();
         String legend = "(Bytes)";
         if (_maxMemory < Long.MAX_VALUE)