Fix overflow risk in split point

Sizeof of search stack should be PLY_MAX+2 instead of PLY_MAX.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

diff --git a/src/thread.h b/src/thread.h
index 5c169ee..fd28ddf 100644 (file)
--- a/src/thread.h
+++ b/src/thread.h
@@ -46,7 +46,7 @@ const int THREAD_MAX = 8;
 struct SplitPoint {
   SplitPoint *parent;
   Position pos;
-  SearchStack sstack[THREAD_MAX][PLY_MAX];
+  SearchStack sstack[THREAD_MAX][PLY_MAX_PLUS_2];
   SearchStack *parentSstack;
   int ply;
   Depth depth;