Removed no longer needed inclusion of heap.h.

diff --git a/files/smb.c b/files/smb.c
index 56c90f1..21c711d 100644
--- a/files/smb.c
+++ b/files/smb.c
@@ -103,8 +103,8 @@
 #include "winerror.h"
 #include "windef.h"
 #include "winbase.h"
+#include "winnls.h"
 #include "file.h"
-#include "heap.h"
 
 #include "smb.h"