[AC21.4] Mule-CCL couldn't handle control-1 characters either.

NOTE: This patch has been committed. APPROVE COMMIT RECOMMEND 21.4, SXEmacs I was aware CCL was doing something like this for a long time; I just told myself that the code was part of XEmacs, it must be me who was getting stuff wrong. There’s an EBCDIC coding system, for example, at http://parhasard.net/ebcdic-na.el that works after this change has been applied. Also, writing a Windows-1252 coding system now becomes possible. src/ChangeLog addition: 2005-04-05 Aidan Kehoe <kehoea(a)parhasard.net&gt; * mule-ccl.c (ccl_driver): Calculate the charset and position code for control-1 characters properly, both when reading multibyte characters and writing them.