ChipSet smaller than intended should have pixels considered as blank for everything out of bounds instead of using what is on the ChipSet

[Mimigris]

Platform:
Player 0.8.0 continuous build, Windows 64 bits.

How to reproduce:
Create a ChipSet smaller than what is intended, for example to not include the upper layer (288×256), and use a constant solid color like black that is not set as transparent. RPG_RT will render the lower layer as black while EasyRPG will also render the upper layer as black while the upper layer is not even on the ChipSet.
It seems that RPG_RT renders tiles/part of tiles that are out of bounds as blank, and it seems that EasyRPG currently does not replicate that correctly.