STARK: enableInventoryItem crashes the game when used with non-existing id

[Faalagorn]

When you type enableInventoryItem with an id that does not exist, ex. enableInventoryItem 107 or enableInventoryItem -1 into the game debug console (ctrl + d), the game crashes with the following error message:

residualvm: ./common/array.h:192: T& Common::Array<T>::operator[](Common::Array<T>::size_type) [with T = Stark::Resources::Item*; Common::Array<T>::size_type = unsigned int]: Assertion `idx < _size' failed.
Aborted (core dumped)

• Information about the game: The Longest Journey, all versions (tested on GOG, Steam, Steam demo, retail demo)
• Language of game: English
• Platform: Linux

[DouglasLiuDev]

Fixed in #1456