Option --devn is not respected when chcking for open sell orders

[syzygy800]

It is my understanding that the bot checks if a filled buy order has already an open sell order. When using --devn this seems not work because itis not included in the calculation. I have accumulated 5 sell orders at the same price because the bot bought the same support every two hours.

See command/buy/standard.go around the comment line "step 2: has this filled BUY order NOT been sold?"