#247 Error bulding gem with Clang: addition of default argument on redeclaration makes this constructor a default constructor

[Luke]

Building gem 0.93.3-10 results in

gemlist_info.cpp:37:42: error: addition of default argument on redeclaration makes this constructor a default constructor

A full log of this error can be found here:
http://clang.debian.net/logs/2016-08-30/gem_0.93.3-10_unstable_clang.log