Fix for minecart naming

src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java

@@ -65,7 +65,6 @@ import org.bukkit.entity.Item;
 import org.bukkit.entity.ItemFrame;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.entity.Minecart;
-import org.bukkit.entity.MinecartTNT;
 import org.bukkit.entity.Painting;
 import org.bukkit.entity.Projectile;
 import org.bukkit.entity.TNTPrimed;
@@ -115,6 +114,18 @@ public class BukkitWorld extends LocalWorld {
     private static Method nmsGetMethod;
     private static Method nmsSetSafeMethod;
 
+    // copied from WG
+    private static <T extends Enum<T>> T tryEnum(Class<T> enumType, String ... values) {
+        for (String val : values) {
+            try {
+                return Enum.valueOf(enumType, val);
+            } catch (IllegalArgumentException e) {}
+        }
+        return null;
+    }
+    private static org.bukkit.entity.EntityType tntMinecartType;
+    private static boolean checkMinecartType = true;
+
     /**
      * Construct the object.
      * @param world
@@ -122,6 +133,10 @@ public class BukkitWorld extends LocalWorld {
     public BukkitWorld(World world) {
         this.world = world;
 
+        if (checkMinecartType) {
+            tntMinecartType = tryEnum(org.bukkit.entity.EntityType.class, "MINECART_TNT");
+            checkMinecartType = false;
+        }
         // check if we have a class we can use for nms access
 
         // only run once per server startup
@@ -1032,7 +1047,7 @@ public class BukkitWorld extends LocalWorld {
                     ++num;
                 }
             } else if (type == EntityType.TNT) {
-                if (ent instanceof TNTPrimed || ent instanceof MinecartTNT) {
+                if (ent instanceof TNTPrimed || ent.getType() == tntMinecartType) {
                     ent.remove();
                     ++num;
                 }