Minor changes

* configure.ac: Set version 3.1.91
* NEWS: Update.
* doc/texinfo/programs.texi: Minor change.
* libmailutils/mime/mime.c (_mime_part_size)
(_mime_body_lines): Fix counting. Return 0 if MIME is empty.

@@ -5,7 +5,7 @@ See the end of file for copying conditions.
 Please send mailutils bug reports to <bug-mailutils@gnu.org>.
 
 
-Version 3.1.90 (Git)
+Version 3.1.91 (Git)
 
 * mail
 
@@ -20,11 +20,11 @@ description), and file name:
      
   --content-filename=NAME
      Sets the file name (the "filename" parameter in the
-     Content-Description MIME header of the outgoing message.
+     Content-Description MIME header of the outgoing message).
 
 Both options affect only the next `--attach' or `--attach-fd' option.
 
-* Constructing attachments from command line
+** Constructing attachments from command line
 
 The new option `--attach-fd=N' instructs mail to read attachment from
 file descriptor N.  By default, the attachments created using this

@@ -16,7 +16,7 @@ dnl You should have received a copy of the GNU General Public License along
 dnl with GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
 
 AC_PREREQ(2.63)
-AC_INIT([GNU Mailutils], [3.1.90], [bug-mailutils@gnu.org], [mailutils],
+AC_INIT([GNU Mailutils], [3.1.91], [bug-mailutils@gnu.org], [mailutils],
         [http://mailutils.org])
 AC_CONFIG_SRCDIR([libmailutils/mailbox/mailbox.c])
 AC_CONFIG_AUX_DIR([build-aux])

@@ -2879,7 +2879,7 @@ Prints additional debugging output.
 
 @item -s @var{string}
 @itemx --sender=@var{string}
-Prints only mail whose @samp{From:} headers contain the supplied string.
+Prints only mail with @samp{From:} header containing the supplied string.
 @FIXME{Probably, this should test envelopes as well.}
 
 @item -f @var{url}

@@ -545,8 +545,11 @@ _mime_part_size (mu_mime_t mime, size_t *psize)
   int ret;
 
   if (mime->nmtp_parts == 0)
-    return EINVAL;
-
+    {
+      *psize = 0;
+      return 0;
+    }
+  
   if ((ret = _mime_set_content_type (mime)) != 0)
     return ret;
   if (mime->nmtp_parts == 1)
@@ -855,20 +858,26 @@ _mime_body_lines (mu_body_t body, size_t *plines)
   mu_message_t       msg = mu_body_get_owner (body);
   mu_mime_t          mime = mu_message_get_owner (msg);
   int             i, ret;
-  size_t          lines;
+  size_t          total = 0;
 
   if (mime->nmtp_parts == 0)
-    return EINVAL;
-
+    {
+      *plines = 0;
+      return 0;
+    }
+  
   if ((ret = _mime_set_content_type (mime)) != 0)
     return ret;
   for (i = 0; i < mime->nmtp_parts; i++)
     {
+      size_t lines;
+      
       mu_message_lines (mime->mtp_parts[i]->msg, &lines);
-      plines += lines;
+      total += lines;
       if (mime->nmtp_parts > 1)	/* boundary line */
-	plines++;
+	total++;
     }
+  *plines = total;
   return 0;
 }
 

@@ -29,7 +29,7 @@
 
 #include <mailutils/mailutils.h>
 
-void message_display_parts(mu_message_t msg, int indent);
+void message_display_parts (mu_message_t msg, int indent);
 
 const char *from;
 const char *subject;