null pointer fix

Author: mjmjelde

src/main/java/com/pokegoapi/api/inventory/Inventories.java

@@ -125,7 +125,7 @@ public void updateInventories(boolean forceUpdate) throws LoginFailedException,
 
 			// pokebank
 			if (itemData.getPokemonData().getPokemonId() != PokemonId.MISSINGNO) {
-				pokebank.addPokemon(new Pokemon(inventoryItem.getInventoryItemData().getPokemonData()));
+				pokebank.addPokemon(new Pokemon(api, inventoryItem.getInventoryItemData().getPokemonData()));
 			}
 
 			// items

src/main/java/com/pokegoapi/api/pokemon/Pokemon.java

@@ -44,14 +44,14 @@
 public class Pokemon {
 
 	private static final String TAG = Pokemon.class.getSimpleName();
-	@Setter
-	PokemonGo pgo;
+	private final PokemonGo pgo;
 	private PokemonData proto;
 
 	// API METHODS //
 
 	// DELEGATE METHODS BELOW //
-	public Pokemon(PokemonData proto) {
+	public Pokemon(PokemonGo api, PokemonData proto) {
+		this.pgo = api;
 		this.proto = proto;
 	}