fix addTX.

lib/bcoin/pool.js

@@ -878,13 +878,16 @@ Pool.prototype._addTX = function(hash, state) {
   }
 
   if (this.tx.state[hash] == null) {
-    if (state == null)
-      state = 1;
     this.tx.state[hash] = state;
     this.tx.count++;
     return true;
   }
 
+  if (this.tx.state[hash] < state) {
+    this.tx.state[hash] = state;
+    return true;
+  }
+
   return false;
 };