Check if game is over when parsing fen to position

It can solve the problem that after tapping Move Now after this kind of FEN import,
AI can't do 2 move in a row. (when specific settings are turned on)
**@@@@**/**@oO@**/**@oO@** w m s 4 0 8 0 1 0 0 1
**@@@@**/**@oO@**/**@oO@** w m s 4 0 8 0 0 0 0 1

But it still can't be solved for the following FEN.
**@@@@**/**@oO@**/**@oO@** w m r 4 0 8 0 1 0 0 1

Change-Id: Id30a2ca6e81de687a882f1b9aaaf5c596cd243f3

src/position.cpp

@@ -377,6 +377,16 @@ Position &Position::set(const string &fenStr, Thread *th)
     // handle also common incorrect FEN with fullmove = 0.
     gamePly = std::max(2 * (gamePly - 1), 0) + (sideToMove == BLACK);
 
+    // For Mill only
+    check_if_game_is_over();
+#if 0
+    // It doesn't work
+    if (pieceToRemoveCount[sideToMove] == 1) {
+        action = Action::remove;
+        isStalemateRemoving = true;
+    }
+#endif
+
     thisThread = th;
 
     return *this;