function ext = mexext(platform)
%MEXEXT MEX filename extension for this platform. 
%   EXT = MEXEXT returns the file name extension for the current
%   PLATFORM. 

%   Copyright (c) 1984-98 by The MathWorks, Inc.
%   $Revision: 1.4 $  $Date: 1997/11/21 23:35:46 $
%   Built-in function.
