Ruby

compile.c: fix unconditional branch optimization

• compile.c (iseq_peephole_optimize): add dummy putnil after a
  jump replacing an unconditional branch, to adjust removed
  dup. [ruby-core:86666] [Bug #14708]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63255 b2dd03c8-39d4-4d8f-98ff-823fe69b080e