(mm-mailcap-mime-info): If `string' is invalid content type format, use

`string' as major content type.

diff --git a/lisp/mm-mailcap.el b/lisp/mm-mailcap.el
index 278b50e..d94c948 100644 (file)
--- a/lisp/mm-mailcap.el
+++ b/lisp/mm-mailcap.el
@@ -664,8 +664,10 @@ this type is returned."
        ctl)
     (save-excursion
       (setq ctl (mail-header-parse-content-type (or string "text/plain")))
-      (setq major (symbol-name (mime-content-type-primary-type ctl)))
-      (setq minor (symbol-name (mime-content-type-subtype ctl)))
+      (setq major (if ctl
+                     (symbol-name (mime-content-type-primary-type ctl))
+                   string))
+      (setq minor (and ctl (symbol-name (mime-content-type-subtype ctl))))
       (when (setq major-info (cdr (assoc major mm-mailcap-mime-data)))
        (when (setq viewers (mm-mailcap-possible-viewers major-info minor))
          (setq info (mapcar (lambda (a) (cons (symbol-name (car a))