Fix compilation warnings and recursive inclusion.

src/message.h

@@ -0,0 +1,39 @@
+/* -*- C -*- 
+  mboxgrep - scan mailbox for messages matching a regular expression
+  Copyright (C) 2020  Daniel Spiljar
+
+  Mboxgrep is free software; you can redistribute it and/or modify it 
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  Mboxgrep is distributed in the hope that it will be useful, but 
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with mboxgrep; if not, write to the Free Software Foundation, 
+  Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+  $Id$ */
+
+#ifndef MESSAGE_H
+#define MESSAGE_H 1
+
+#include <config.h>
+
+typedef struct
+{
+  char *filename; /* used with directory formats, such as maildir or MH */
+  char *msgid; 
+  char *from;
+  char *headers;
+  int hbytes;
+  char *body;
+  int bbytes;
+  time_t date;
+}
+message_t;
+
+#endif /* MESSAGE_H */