Enable support of PotionMeta on SPLASH_POTION, LINGERING_POTION and TIPPED_ARROW.

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

@@ -76,6 +76,9 @@ public final class CraftItemFactory implements ItemFactory {
         case LEATHER_BOOTS:
             return meta instanceof CraftMetaLeatherArmor ? meta : new CraftMetaLeatherArmor(meta);
         case POTION:
+        case SPLASH_POTION:
+        case LINGERING_POTION:
+        case TIPPED_ARROW:
             return meta instanceof CraftMetaPotion ? meta : new CraftMetaPotion(meta);
         case MAP:
             return meta instanceof CraftMetaMap ? meta : new CraftMetaMap(meta);

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

@@ -338,6 +338,9 @@ public final class CraftItemStack extends ItemStack {
             case LEATHER_BOOTS:
                 return new CraftMetaLeatherArmor(item.getTag());
             case POTION:
+            case SPLASH_POTION:
+            case LINGERING_POTION:
+            case TIPPED_ARROW:
                 return new CraftMetaPotion(item.getTag());
             case MAP:
                 return new CraftMetaMap(item.getTag());

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

@@ -109,6 +109,9 @@ class CraftMetaPotion extends CraftMetaItem implements PotionMeta {
     boolean applicableTo(Material type) {
         switch(type) {
             case POTION:
+            case SPLASH_POTION:
+            case LINGERING_POTION:
+            case TIPPED_ARROW:
                 return true;
             default:
                 return false;