align_families.py: Prevent later exception when mafft fails. - It was catching the exception, but this left the function's return value undefined, or worse,   defined from the previous loop.
align_families.py: Prevent later exception when mafft fails.
- It was catching the exception, but this left the function's return value undefined, or worse,
  defined from the previous loop.

makrutenko/dunovo,makrutenko/dunovo,makrutenko/dunovo