old Cygwin.

* file.c (rb_file_truncate): added prototype of GetLastError()
  on cygwin.  [ruby-dev:31239]

* intern.h (is_ruby_native_thread): prototype.

* missing/strftime.c (strftime): fix printf format and actual
  arguments.

* ext/Win32API/Win32API.c (Win32API_initialize): ditto.

* ext/tk/tcltklib.c (ip_finalize): ditto.

* ext/dl/ptr.c (rb_dlptr_inspect): ditto.  [ruby-dev:31268]

* ext/dl/sym.c (rb_dlsym_inspect): ditto.

* ext/socket/getnameinfo.c: include stdio.h always.

* ext/win32ole/win32ole.c (ole_hresult2msg, folevariable_name,
  folevariable_ole_type, folevariable_ole_type_detail,
  folevariable_value, folemethod_visible): missing return value.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@12835 b2dd03c8-39d4-4d8f-98ff-823fe69b080e