[ic] [interchange] Fix potential "use of uninitialized value" if called during startup

[Jon Jensen]

On Fri, 23 Jun 2017, David Christensen wrote:

> Probably obvious my opinion on it, but +1 to move it to 5.14.1 (I’d even 
> say as long as we’re increasing it, forget Deb 7 and just go with 5.16, 
> but that’s just me);

You may have missed in my message that RHEL/CentOS 6 are also on 5.14.1, 
and those are still supported for a few more years. IMO that's as new as 
we should go right now.

> if you’re willing to upgrade your TLS, want to upgrade your IC, but 
> unwilling to install a new version of perl it makes no sense here. At 
> some point you have to start moving forward.

Indeed.

Jon