Without the added line, the gcc-7.2.0 compiler will give the following error:
```
/opt/compiler-explorer/libs/fmt/trunk/include/fmt/format.h:1240:8: error: uninitialized variable 'buffer' in 'constexpr' function
Char buffer[digits10<UInt>() + 1];
^~~~~~
```
See https://godbolt.org/z/fh7TMs9qs
Also replaces the SFIANE tricks applied in
ce7ecdb7af with conditional compilation.
The code was too complicated along with the other trick to access private
data members.
* Implement range_formatter and format_kind
* Attempted gcc 4.8 fix
* gcc 4.8 interprets inaccessible as a hard error (instead of... not available)
* Attempting to delete set_debug_format.
* clang-format
* Different implementation of FMT_STATICALLY_WIDEN
* Renaming copy_str_range to copy_str.
* I guess I need a definition
* Forgot to delete these.
* Other PR comments.
* Refactor detail::print() by splitting into two functions.
The part with SetConsoleW is a separate function, without fwrite().
* Make Unicode handing when writing to std::ostream more robust.
Calls to print(ostream&) in the special Unicode case on Windows fallback
to writing via ostream::write instead of fwrite().
* Fix Unicode handling when writing to an ostream on GCC on Windows
* Add TODO note about detail::is_utf8()
* Fix warning -Wundef
* Fix for non-Windows OSs
* Fix building as DLL on Windows
* Refactor
* Suppress warning
* 2954: Add test case
* Eliminate extra-test and merge it into existing std-test instead. Add conditionals for filesystem::path testing that does not run into the ambiguity problem.
* #2968: Introduce additional compile-time predicate to detect recursive ranges and reject them in formatter specialization for ranges. In addition, introduce additional wrapper traits for the individual logical operands of the complete range constraints
* #2968: Eliminate preprocessor condition that enables the formatter specialization for std::filesystem::path
* #2968: Eliminate preprocessor condition that enables the test for the formatter specialization for std::filesystem::path
* Use own bool_constant, which is available for all C++ versions
* Reintroduce previous workaround but restrict to VS 2015 for now
* Comma fix
* - Rename is_not_recursive_range to is_nonrecursive_range and add comment that explains it being depending on is_range being true
- Merge has_fallback_formatter_delayed into is_formattable_delayed and add comment that explains it being depending on is_not_recursive_range being true
- Replace disjunction in formatter specialization by has_fallback_formatter_delayed
- Get rid of unneeded detail:: prefixes within namespace detail
