calc_TLLxTxRatio() fails if Tx.data.background=NULL

[mcol]

The following code causes calc_TLLxTxRatio() to crash:

data(ExampleData.BINfileData, envir = environment())
temp <- Risoe.BINfileData2RLum.Analysis(TL.SAR.Data, pos = 3)
calc_TLLxTxRatio(
    Lx.data.signal=get_RLum(temp, record.id = 1),
    Lx.data.background=get_RLum(temp, record.id = 2),
    Tx.data.signal=get_RLum(temp, record.id = 3),
    Tx.data.background=NULL,  ##  no crash if Tx.data.background=get_RLum(temp, record.id = 4)
    signal.integral.min=210,
    signal.integral.max=230)

Error in calc_TLLxTxRatio(Lx.data.signal, Lx.data.background, Tx.data.signal,  : 
  object 'BG.Error' not found

Indeed, variable BG.Error is set only if argument Tx.data.background != NULL, while instead it should be given a default value.

[RLumSK]

Thanks!