Disable the RtlBitMap tests if compiling with the Microsoft headers as
they are missing critical structure and API declarations.

diff --git a/include/winternl.h b/include/winternl.h
index 99d592e..9aab579 100644
--- a/include/winternl.h
+++ b/include/winternl.h
@@ -18,8 +18,8 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#ifndef __WINE_WINTERNAL_H
-#define __WINE_WINTERNAL_H
+#ifndef __WINE_WINTERNL_H
+#define __WINE_WINTERNL_H
 
 #include <windef.h>
 
@@ -1748,4 +1748,4 @@
 } /* extern "C" */
 #endif /* defined(__cplusplus) */
 
-#endif  /* __WINE_WINTERNAL_H */
+#endif  /* __WINE_WINTERNL_H */