include: Add missing defines to mddk.h.
diff --git a/include/mmddk.h b/include/mmddk.h
index f7e260f..17366db 100644
--- a/include/mmddk.h
+++ b/include/mmddk.h
@@ -89,6 +89,8 @@
#define DRV_QUERYSTRINGID (DRV_RESERVED + 14)
#define DRV_QUERYSTRINGIDSIZE (DRV_RESERVED + 15)
#define DRV_QUERYIDFROMSTRINGID (DRV_RESERVED + 16)
+#define DRV_QUERYFUNCTIONINSTANCEID (DRV_RESERVED + 17)
+#define DRV_QUERYFUNCTIONINSTANCEIDSIZE (DRV_RESERVED + 18)
#ifdef __WINESRC__
#define DRV_QUERYDSOUNDIFACE (DRV_RESERVED + 20)
#define DRV_QUERYDSOUNDDESC (DRV_RESERVED + 21)