driver/*.c: Add response for get_arg("mmc-supported?")

example/*.c: remove compiler wranings.

example/paranoia.c

@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2005, 2006, 2008, 2009 Rocky Bernstein <rocky@gnu.org>
+  Copyright (C) 2005, 2006, 2008, 2009, 2010 Rocky Bernstein <rocky@gnu.org>
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -22,6 +22,10 @@
 #include <cdio/cd_types.h>
 #include <stdio.h>
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #ifdef HAVE_STDLIB_H
 #include <stdlib.h>
 #endif