Don't permit to open inventory is playerCAO isn't present. This prevent to...

Don't permit to open inventory is playerCAO isn't present. This prevent to open an empty inventory at player load. ok @zeno-

src/game.cpp

@@ -2669,6 +2669,15 @@ void Game::dropSelectedItem()
 
 void Game::openInventory()
 {
+	/*
+	 * Don't permit to open inventory is CAO or player doesn't exists.
+	 * This prevent showing an empty inventory at player load
+	 */
+
+	LocalPlayer *player = client->getEnv().getLocalPlayer();
+	if (player == NULL || player->getCAO() == NULL)
+		return;
+
 	infostream << "the_game: " << "Launching inventory" << std::endl;
 
 	PlayerInventoryFormSource *fs_src = new PlayerInventoryFormSource(client);