diff -up mutt-1.10.1/send.c.mutt-1.9.3-1_coverity_181 mutt-1.10.1/send.c

--- mutt-1.10.1/send.c.mutt-1.9.3-1_coverity_181	2018-11-26 12:08:42.615216677 +0100

+++ mutt-1.10.1/send.c	2018-11-26 12:08:52.007351542 +0100

@@ -243,7 +243,7 @@ static int edit_envelope (ENVELOPE *en)

       if (ascii_strncasecmp ("subject:", uh->data, 8) == 0)

       {

 	p = skip_email_wsp(uh->data + 8);

-	strncpy (buf, p, sizeof (buf));

+	strfcpy (buf, p, sizeof (buf));

       }

     }

   }