MAO/PSAP/S1 - Reprocess: Ingest problem

A logic error in the code cause the program to fail when there were no impactor data 
available.

• AOS PSAP3W transmittance, green channel(TrG)
• AOS PSAP3W mass flow, mV(mass_flow_voltage)
• Averaging time interval(averaging_time)
• Mass flow(mass_flow)
• Aerosol light absorption coefficient, nominal red wavelength at dry or reference
  RH(Ba_R_PSAP3W)
• AOS PSAP3W flags(psap_flags)
• Aerosol light absorption coefficient, nominal green wavelength at dry or
  reference RH(Ba_G_PSAP3W)
• AOS PSAP3W transmittance, blue channel(TrB)
• AOS PSAP3W transmittance, red channel(TrR)
• Aerosol light absorption coefficient, nominal blue wavelength at dry or
  reference RH(Ba_B_PSAP3W)