Fix member variable is not initialized in the constructor

src/movegen.h

@@ -99,7 +99,8 @@ struct MoveList
     inline static Square moveTable[SQUARE_NB][MD_NB] = { {SQ_0} };
 
 private:
-    ExtMove moveList[MAX_MOVES], *last;
+    ExtMove moveList[MAX_MOVES] { {MOVE_NONE, 0} };
+    ExtMove *last {nullptr};
 };
 
 #endif // #ifndef MOVEGEN_H_INCLUDED

src/movepick.h

@@ -141,7 +141,8 @@ public:
 
     Position &pos;
     Move ttMove { MOVE_NONE };
-    ExtMove *cur, *endMoves;
+    ExtMove *cur { nullptr };
+    ExtMove *endMoves { nullptr };
     ExtMove moves[MAX_MOVES]{ {MOVE_NONE, 0} };
 
     int moveCount{ 0 };