When to bump library api version (current)

[Adam Mercer]

Hi

We are coming up for a new release of one of the libraries I maintain
and I'm not sure whether the library api version needs bumping
(specifically current). The only API change is that the function
below:

double calculate_ligo_snr_from_strain(
  REAL4TimeVectorSeries *strain,
  SimInspiralTable *thisInj,
  char ifo[3]);

has changed to:

double calculate_ligo_snr_from_strain(
  REAL4TimeVectorSeries *strain,
  SimInspiralTable *thisInj,
  const char ifo[3]);

i.e. the third argument has changed from char to const char, whilst
this is technically an API change I'm not sure if it warrants an API
bump? Should current be bumped in this case or is it OK not to bump
current (or bump both current and age)?

Cheers

Adam