In r869 the level water tile for canals was changed to match rivers, but this has left a mismatch with locks and aqueducts, so the same change should be made for these as well.
Also r856, a similar change was made for fountains. Hotel swimming pool should also be changed.
Updated sprite sheets for aqueduct and hotel. I've modified the existing sprites so no code change required, but I can split the updated sprites into a new png if that is preferred.
Code change for locks sloped water.
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