Include wtools.h - needed because message() has been moved there.

vfs/utilvfs.h

@@ -1,5 +1,6 @@
 #include "../src/global.h"
 
 #include "../src/tty.h"		/* enable/disable interrupt key */
-#include "../src/background.h"
-#include "../src/main.h"
+#include "../src/wtools.h"	/* MSG_ERROR */
+#include "../src/background.h"  /* message_1s */
+#include "../src/main.h"	/* print_vfs_message */