added memory debugging include file

lib/mprintf.c

@@ -98,6 +98,10 @@ static const char rcsid[] = "@(#)$Id$";
 #include <ctype.h>
 #include <string.h>
 
+/* The last #include file should be: */
+#ifdef MALLOCDEBUG
+#include "memdebug.h"
+#endif
 
 #define BUFFSIZE 256 /* buffer for long-to-str and float-to-str calcs */
 #define MAX_PARAMETERS 128 /* lame static limit */