IPv6 hop limit is initialised inconsistently in the code

[tim-ist]

In IPProtocolP.nc it is hardcoded to 16:
msg->ip6_hdr.ip6_hops = 16;
While in IPP.nc it is set to IP_HOP_LIMIT which is equal to 64.
hdr->hlim = IP_HOP_LIMIT;

The question is whether this difference is intentional. If such, is it reasonable to introduce a (separate) configuration constant for the first case?
The reason is that I need to increase the (first) hop limit and would like to find the right way of doing it.