* mu4e: hide some non-attachments from the attachment list in the view

mu4e/mu4e-view.el

@@ -378,9 +378,9 @@ is nil, and otherwise open it."
 	    ;; we only list parts that look like attachments, ie. that have a
 	    ;; non-nil :attachment property; we record a mapping between user-visible
 	    ;; numbers and the part indices
-	    (remove-if-not
+	    (remove-if
 	      (lambda (part)
-		(plist-get part :attachment))
+		(member 'inline (plist-get part :type)))
 	      (plist-get msg :parts)))
 	  (attstr
 	   (mapconcat