SPIGOT-5809: block.getState() instanceof Sign for warped_sign missed

src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java

@@ -323,6 +323,7 @@ public class CraftBlock implements Block {
         case OAK_WALL_SIGN:
         case SPRUCE_SIGN:
         case SPRUCE_WALL_SIGN:
+        case WARPED_SIGN:
             return new CraftSign(this);
         case CHEST:
         case TRAPPED_CHEST:

src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java

@@ -208,6 +208,7 @@ public final class CraftItemFactory implements ItemFactory {
         case OAK_WALL_SIGN:
         case SPRUCE_SIGN:
         case SPRUCE_WALL_SIGN:
+        case WARPED_SIGN:
         case SPAWNER:
         case BREWING_STAND:
         case ENCHANTING_TABLE:

src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java

@@ -477,6 +477,7 @@ public final class CraftItemStack extends ItemStack {
             case OAK_WALL_SIGN:
             case SPRUCE_SIGN:
             case SPRUCE_WALL_SIGN:
+            case WARPED_SIGN:
             case SPAWNER:
             case BREWING_STAND:
             case ENCHANTING_TABLE:

src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBlockState.java

@@ -203,6 +203,7 @@ public class CraftMetaBlockState extends CraftMetaItem implements BlockStateMeta
             case OAK_WALL_SIGN:
             case SPRUCE_SIGN:
             case SPRUCE_WALL_SIGN:
+            case WARPED_SIGN:
             case SPAWNER:
             case BREWING_STAND:
             case ENCHANTING_TABLE:
@@ -308,6 +309,7 @@ public class CraftMetaBlockState extends CraftMetaItem implements BlockStateMeta
         case OAK_WALL_SIGN:
         case SPRUCE_SIGN:
         case SPRUCE_WALL_SIGN:
+        case WARPED_SIGN:
             if (te == null) {
                 te = new TileEntitySign();
             }
@@ -537,6 +539,7 @@ public class CraftMetaBlockState extends CraftMetaItem implements BlockStateMeta
         case OAK_WALL_SIGN:
         case SPRUCE_SIGN:
         case SPRUCE_WALL_SIGN:
+        case WARPED_SIGN:
             valid = blockState instanceof CraftSign;
             break;
         case CHEST: