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@ -161,7 +161,9 @@ void MakeWaterKeepingClass(TileIndex tile, Owner o)
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/* Autoslope might turn an originally canal or river tile into land */
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int z;
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if (GetTileSlope(tile, &z) != SLOPE_FLAT) {
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Slope slope = GetTileSlope(tile, &z);
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if (slope != SLOPE_FLAT) {
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if (wc == WATER_CLASS_CANAL) {
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/* If we clear the canal, we have to remove it from the infrastructure count as well. */
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Company *c = Company::GetIfValid(o);
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@ -169,8 +171,14 @@ void MakeWaterKeepingClass(TileIndex tile, Owner o)
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c->infrastructure.water--;
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DirtyCompanyInfrastructureWindows(c->index);
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}
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/* Sloped canals are locks and no natural water remains whatever the slope direction */
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wc = WATER_CLASS_INVALID;
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}
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/* There must not be water sloped invalidly, whatever class it may be */
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if (GetInclinedSlopeDirection(slope) == INVALID_DIAGDIR) {
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wc = WATER_CLASS_INVALID;
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}
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wc = WATER_CLASS_INVALID;
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}
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if (wc == WATER_CLASS_SEA && z > 0) {
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