winbase.h: Add missing LMEM_INVALID_HANDLE define.
diff --git a/include/winbase.h b/include/winbase.h
index aeee6a0..fbbbbcd 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -404,8 +404,9 @@
 #define LMEM_ZEROINIT       0x0040
 #define LMEM_MODIFY         0x0080
 #define LMEM_DISCARDABLE    0x0F00
-#define LMEM_DISCARDED	    0x4000
-#define LMEM_LOCKCOUNT	    0x00FF
+#define LMEM_DISCARDED      0x4000
+#define LMEM_INVALID_HANDLE 0x8000
+#define LMEM_LOCKCOUNT      0x00FF
 
 #define LPTR (LMEM_FIXED | LMEM_ZEROINIT)
 #define LHND (LMEM_MOVEABLE | LMEM_ZEROINIT)