lisp/gnus/gnus-art.el (gnus-article-browse-html-*): Work for broken Chinese articles

lisp/gnus/ChangeLog

+2013-11-27  Katsumi Yamaoka  <yamaoka@jpl.org>
+
+	Work for broken Chinese articles.
+
+	* gnus-art.el (gnus-article-browse-html-save-cid-content):
+	Exclude broken handles that gnus-summary-enter-digest-group may create.
+	(gnus-article-browse-html-parts):
+	Allow overriding charset by mm-charset-override-alist.
+
 2013-11-21  Jan Tatarik  <jan.tatarik@gmail.com>
 	* gnus-icalendar.el (gnus-icalendar-additional-identities): New.

lisp/gnus/gnus-art.el

@@ -2794,6 +2794,9 @@ Return file name."
 	(dolist (handle handles)
 	  (cond
 	   ((not (listp handle)))
+	   ;; Exclude broken handles that `gnus-summary-enter-digest-group'
+	   ;; may create.
+	   ((not (or (bufferp (car handle)) (stringp (car handle)))))
 	   ((equal (mm-handle-media-supertype handle) "multipart")
 	    (when (setq file (gnus-article-browse-html-save-cid-content
 			      cid handle directory))
@@ -2801,11 +2804,12 @@ Return file name."
 	   ((equal (concat "<" cid ">") (mm-handle-id handle))
 	    (setq file
 		  (expand-file-name
-                   (or (mm-handle-filename handle)
-                       (concat
-                        (make-temp-name "cid")
-                        (car (rassoc (car (mm-handle-type handle)) mailcap-mime-extensions))))
-                   directory))
+		   (or (mm-handle-filename handle)
+		       (concat
+			(make-temp-name "cid")
+			(car (rassoc (car (mm-handle-type handle))
+				     mailcap-mime-extensions))))
+		   directory))
 	    (mm-save-part-to-file handle file)
 	    (throw 'found file))))))))
 
@@ -2908,7 +2912,7 @@ message header will be added to the bodies of the \"text/html\" parts."
 		     (cond ((= (length hcharset) 1)
 			    (setq hcharset (car hcharset)
 				  coding (mm-charset-to-coding-system
-					  hcharset)))
+					  hcharset nil t)))
 			   ((> (length hcharset) 1)
 			    (setq hcharset 'utf-8
 				  coding hcharset)))
@@ -2916,7 +2920,8 @@ message header will be added to the bodies of the \"text/html\" parts."
 			 (if charset
 			     (progn
 			       (setq body
-				     (mm-charset-to-coding-system charset))
+				     (mm-charset-to-coding-system charset
+								  nil t))
 			       (if (eq coding body)
 				   (setq eheader (mm-encode-coding-string
 						  (buffer-string) coding)