bug on platform specific dialogs of Tcl/Tk Aqua on MacOS X.
* ext/tk/tcltklib.c: fix bug on switching threads and waiting on the
  deleted interpreter on vwait and tkwait command.
* ext/tk/lib/multi-tk.rb: kill the meaningless loop for the deleted Tk
  interpreter.
* ext/tk/sample/demos-jp/image3.rb: [bug fix] wrong argument.
* ext/tk/sample/demos-en/image3.rb: ditto.
* ext/tk/sample/demos-jp/menu.rb: fix message for MacOS X.
* ext/tk/sample/demos-jp/menu8x.rb: ditto.
* ext/tk/sample/demos-en/menu.rb: ditto.
* ext/tk/sample/demos-jp/widget; update version-info.
* ext/tk/sample/demos-en/widget; ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@9650 b2dd03c8-39d4-4d8f-98ff-823fe69b080e