TETRIS: fix bug where shadows took pieces out of bag

tetris/custom_classes.hpp

@@ -21,6 +21,7 @@ public:
     }
     TetrisBlock( const TetrisBlock &other ) : TetrisBlock(other.getDoubleRect().first.first,other.getDoubleRect().first.second,other.getDoubleRect().second.first,other.getDoubleRect().second.second,other.getRenderer(), other.getColor(), true, other._index, other._scene, other.pieces_bag) {}
     ~TetrisBlock() {
+        if(_index != PIECE_SHADOW)
             pieces_bag[_index]++;
     }
     virtual std::shared_ptr<RenderObject> copySelf() override {
@@ -55,6 +56,8 @@ public:
     }
     void turnIntoShadow() {
         setId(SHADOW_ID);
+        // shadows don't consume pieces from bag
+        pieces_bag[_index]++;
         _index = PIECE_SHADOW;
         setColors();
     }