nx2: show the area of a present the game says it drew

vi2 229 carries the size the game drew into the presented image in word
7, ((height - 1) << 16) | (width - 1), from the image's top-left corner:
Kirby Air Riders draws 1920x1080 into 2560x1440 images (0x0437077f) and
Mario Kart World 2560x1440 into 3840x2160 ones (0x059f09ff). Docked,
Kirby's frame sat in the top-left corner with black to the right and
below. Crop to the given size; the handheld 1920x1080 limit still
applies, and Mario Kart World's docked crop stays only for presents that
give none.

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