Ruby » Ruby master

remove backward macros

• include/ruby/backward.h (rb_cFixnum, rb_cBignum): remove the
  backward compatibility macros, to fail incompatible extension
  libraries earily. [Bug #12427]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55413 b2dd03c8-39d4-4d8f-98ff-823fe69b080e