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@@ -211,7 +211,7 @@ CommandCost CmdBuildBridge(TileIndex end
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/* unpack parameters */
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BridgeType bridge_type = GB(p2, 0, 8);
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if (p1 >= MapSize()) return CMD_ERROR;
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if (!IsValidTile(p1)) return CMD_ERROR;
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TransportType transport_type = Extract<TransportType, 15, 2>(p2);
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@@ -270,6 +270,8 @@ CommandCost CmdBuildBridge(TileIndex end
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CommandCost terraform_cost_north = CheckBridgeSlopeNorth(direction, &tileh_start, &z_start);
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CommandCost terraform_cost_south = CheckBridgeSlopeSouth(direction, &tileh_end, &z_end);
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/* Aqueducts can't be built of flat land. */
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if (transport_type == TRANSPORT_WATER && (tileh_start == SLOPE_FLAT || tileh_end == SLOPE_FLAT)) return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
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if (z_start != z_end) return_cmd_error(STR_ERROR_BRIDGEHEADS_NOT_SAME_HEIGHT);
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CommandCost cost(EXPENSES_CONSTRUCTION);
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@@ -345,8 +347,6 @@ CommandCost CmdBuildBridge(TileIndex end
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if (terraform_cost_south.Failed() || (terraform_cost_south.GetCost() != 0 && !allow_on_slopes)) return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
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cost.AddCost(terraform_cost_south);
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if (transport_type == TRANSPORT_WATER && (tileh_start == SLOPE_FLAT || tileh_end == SLOPE_FLAT)) return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
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const TileIndex heads[] = {tile_start, tile_end};
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for (int i = 0; i < 2; i++) {
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if (MayHaveBridgeAbove(heads[i])) {
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