Fix get_waveform and get_waveform_bigfile bugs
requested to merge sudarshan-ghonge/bayeswave:17-megaplot-get_waveform_bigfile-and-get_waveform-function-calls-need-updating into 17-megaplot-get_waveform_bigfile-and-get_waveform-function-calls-need-updating
Getting towards closing 17.