* include/ruby/missing.h (explicit_bzero_by_memset_s): remove
	  inline implementation by memset_s, which needs a macro before
	  including headers and can cause problems in extension libraries
	  by the order of the macro and headers.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@53502 b2dd03c8-39d4-4d8f-98ff-823fe69b080e