stock Product_GetRandomStartLoc(ProductID)
{
    // Setup local variables
    new NumProducts;

    // First find out how many valid start-locations there are in this product
    for (new i; i < 30; i++)
    {
        // If the product has a valid location in this index
        if (ALoads[ProductID][FromLocations][i] != 0)
            NumProducts++; // Count the number of valid start-locations
        else // A start-location with ID 0 has been found (dummy-location)
            break; // Stop counting
    }

    // Return the LocationID that's stored at a random index
    return ALoads[ProductID][FromLocations][random(NumProducts)];
}