ext/tk/extconf.rb: support Tcl/Tk8.6.
ext/tk/tcltklib.c, ext/tk/lib/tk.rb: get rid of SEGV with Tcl/Tk8.6. [Backport #10401]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@50474 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Added by usa (Usaku NAKAMURA) almost 9 years ago
ext/tk/extconf.rb: support Tcl/Tk8.6.
ext/tk/tcltklib.c, ext/tk/lib/tk.rb: get rid of SEGV with Tcl/Tk8.6.
[Backport #10401]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@50474 b2dd03c8-39d4-4d8f-98ff-823fe69b080e