Files @ r28098:2f7e0d913c81
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Location: cpp/openttd-patchpack/source/docs/ottd-colourtext-palette.png

Peter Nelson
Add: Mock sprite cache intialization.

This fills up the sprite cache with SPR_OPENTTD_BASE + OPENTTD_SPRITE_COUNT zero-size sprites, to
allow GetSpriteSize() calls to continue from unit-tests.