Add methods to dNPC and dPlayer to see if the links contained are val…

…id with Bukkit/Citizens.

src/main/java/net/aufdemrand/denizen/objects/dNPC.java

@@ -71,10 +71,12 @@ public static boolean matches(String string) {
         return false;
     }
 
-
+    public boolean isValid() {
+        if (getCitizen() == null) return false;
+        else return true;
+    }
 
     private int npcid = -1;
-    private boolean is_valid = true;
     private final org.bukkit.Location locationCache = new org.bukkit.Location(null, 0, 0, 0);
 
     public dNPC(NPC citizensNPC) {

src/main/java/net/aufdemrand/denizen/objects/dPlayer.java

@@ -103,6 +103,11 @@ public dPlayer(OfflinePlayer player) {
 
     String player_name;
 
+    public boolean isValid() {
+        if (getPlayerEntity() == null && getOfflinePlayer() == null) return true;
+        return false;
+    }
+
     public Player getPlayerEntity() {
         return Bukkit.getPlayer(player_name);
     }