mfpqpcr embedded get_pcr_product.py read primer files may trigger a bug

[jialiu232]

The read_primer function in get_pcr_product.py needs to be modified a little bit to avoid possible error.

In the code:

if name[0] == 'R':
                    if seq in rpri:
                        temp = rpri[rseq] + ',' +name
                        rpri[rseq] = temp
                    else:
                        rpri[rseq] = name

the second if should check if rseq in rpri, instead of if seq in rpri