test_notimp.rb: test timeout

* test/ruby/test_notimp.rb (test_call_fork): test timeout directly.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43268 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
compile.c, vm.c: reduce hash merge

* compile.c (compile_array_): no hash to merge if it is empty.
* vm.c (m_core_hash_merge_kwd): just check keys if only one argument
  is given, without merging.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43269 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-10-13

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43270 b2dd03c8-39d4-4d8f-98ff-823fe69b080e