[boost] [System] Non-standard code in error_code_user_test

Subject: [boost] [System] Non-standard code in error_code_user_test
From: Doug Gregor (doug.gregor_at_[hidden])
Date: 2010-04-27 16:49:58

The code in lib/system/test/error_code_user_test.cpp attempts to
default-initialize a const-qualified variable non-POD class type that
does not have a user-declared default constructor, which is ill-formed
per C++03 [dcl.init]p9 (C++0x [dcl.init]p6). The attached patch fixes
the problem be introducing a user-declared default constructor for two
of the types we're testing with.

  - Doug