Fix checking code about coding-system `x-ctext'.

diff --git a/mcs-e20.el b/mcs-e20.el
index 7eae509..f8257d1 100644 (file)
--- a/mcs-e20.el
+++ b/mcs-e20.el
@@ -159,18 +159,20 @@ Return nil if corresponding MIME-charset is not found."
     ))
 
 (static-when (and (string= (decode-coding-string "\e.A\eN!" 'ctext) "\eN!")
-                 (not (find-coding-system 'x-ctext)))
+                 (or (not (find-coding-system 'x-ctext))
+                     (coding-system-get 'x-ctext 'apel)))
   (require 'poem)
-  (or (find-coding-system 'x-ctext)
-      (make-coding-system
-       'x-ctext 2 ?x
-       "Compound text based generic encoding for decoding unknown messages."
-       '((ascii t) (latin-iso8859-1 t) t t
-        nil ascii-eol ascii-cntl nil locking-shift single-shift nil nil nil
-        init-bol nil nil)
-       '((safe-charsets . t)
-        (mime-charset . x-ctext)))
-      ))
+  (unless (find-coding-system 'x-ctext)
+    (make-coding-system
+     'x-ctext 2 ?x
+     "Compound text based generic encoding for decoding unknown messages."
+     '((ascii t) (latin-iso8859-1 t) t t
+       nil ascii-eol ascii-cntl nil locking-shift single-shift nil nil nil
+       init-bol nil nil)
+     '((safe-charsets . t)
+       (mime-charset . x-ctext)))
+    (coding-system-put 'x-ctext 'apel t)
+    ))
 
 
 ;;; @ end