Fix repeated refreshes on lots of faction update triggers

src/main/java/org/dynmap/factions/DynmapFactionsPlugin.java

@@ -165,6 +165,7 @@ public class DynmapFactionsPlugin extends JavaPlugin {
         if(pending == null) {
             FactionsUpdate upd = new FactionsUpdate();
             upd.runonce = true;
+            pending = upd;
             getServer().getScheduler().scheduleSyncDelayedTask(this, upd, 20);
         }
     }