boostorg/dynamic_bitset — pull request #6 by 0-wiz-0 (2014-05-16 14:42:28+00:00)
Title: Fix implicit conversion changes signedness problems.

clang-3.5 trunk 201163 and OS X's clang (not sure which version)
report -Wsign-conversion warnings with this header. This patch fixes
them.

https://svn.boost.org/trac/boost/ticket/9725

Signed-off-by: Thomas Klausner