include: Add missing WAVEBANKENTRY_FLAGS to xact3wb.h.

include/xact3wb.h

@@ -105,6 +105,12 @@ typedef const WAVEBANKHEADER *LPCWAVEBANKHEADER;
 #define WAVEBANKENTRY_XMASTREAMS_MAX  3
 #define WAVEBANKENTRY_XMACHANNELS_MAX 6
 
+#define WAVEBANKENTRY_FLAGS_READAHEAD         0x00000001
+#define WAVEBANKENTRY_FLAGS_LOOPCACHE         0x00000002
+#define WAVEBANKENTRY_FLAGS_REMOVELOOPTAIL    0x00000004
+#define WAVEBANKENTRY_FLAGS_IGNORELOOP        0x00000008
+#define WAVEBANKENTRY_FLAGS_MASK              0x00000008
+
 typedef struct WAVEBANKENTRY
 {
     union