Drop support for Thai-XTIS causes Windows mule build to fail

[Mats Lidell]

Hi Aidan,

After the change to Drop support for Thai-XTIS the windows mule build
fails. Excerpt from the build below:
      
----------------------------------------------------------------------
[...]
      Loading thai.el...
*** Error in XEmacs initialization
(invalid-operation "Cannot redefine existing coding system" windows-874)
*** Backtrace
[...]
----------------------------------------------------------------------

Seems related. Ideas?

Yours
-- 
%% Mats