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@ -85,6 +85,7 @@ Engine::Engine(VehicleType type, EngineID base)
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this->type = type;
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this->grf_prop.local_id = base;
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this->list_position = base;
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this->preview_company = INVALID_COMPANY;
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/* Check if this base engine is within the original engine data range */
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if (base >= _engine_counts[type]) {
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@ -902,7 +903,7 @@ CommandCost CmdSetVehicleVisibility(TileIndex tile, DoCommandFlag flags, uint32
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CommandCost CmdWantEnginePreview(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
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{
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Engine *e = Engine::GetIfValid(p1);
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if (e == NULL || e->preview_company != _current_company) return CMD_ERROR;
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if (e == NULL || !(e->flags & ENGINE_EXCLUSIVE_PREVIEW) || e->preview_company != _current_company) return CMD_ERROR;
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if (flags & DC_EXEC) AcceptEnginePreview(p1, _current_company);
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