Add support for compiling for ESX

With contributions from Ryan Haynes <rhaynes@fusionio.com>

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/parse.h b/parse.h
index c797b92..2a1e06a 100644
--- a/parse.h
+++ b/parse.h
@@ -73,6 +73,7 @@
 	unsigned int group;		/* who to group with */
 	void *gui_data;
 	int is_seconds;			/* time value with seconds base */
+	int no_warn_def;
 };
 
 typedef int (str_cb_fn)(void *, char *);