* compile.c (iseq_compile_each): remove duplicated line event.
	  [Bug #10449]

	* test/ruby/test_settracefunc.rb: add and fix tests.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@52640 b2dd03c8-39d4-4d8f-98ff-823fe69b080e