Two minor fixes:  1.  Put integral_constant conversion to integral in even without constexpr support.  2.  Add ios_base to <iosfwd>.  The latter is being tracked by LWG 2026.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@123080 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed