dwarf_next_cfi returns -1

[Sasha Da Rocha Pinheiro]

Hi,
We had a case where dwarf_next_cfi returns -1 but the offset does not update, as we should expect by the comment:

 330    On errors, returns -1.  Some format errors will permit safely
 331    skipping to the next CFI entry though the current one is unusable.
 332    In that case, *NEXT_OFF will be updated before a -1 return.
Is there a correct way to deal with it, or just check if the NEXT_OFF had changed?

 Sasha