Fixed max move number when the computer chooses: before it could choose

a move number that was more than the maximum allowed

src/game/morpion.cpp

@@ -209,7 +209,7 @@ namespace game
 	{
 		while (!end_of_game())
 		{
-			uniform_int_distribution<uint16_t> distribution(0, 8-state.total_moves);
+			uniform_int_distribution<uint16_t> distribution(0, number_of_moves() -1);
 			uint16_t move = distribution(engine);
 			play(move);
 		}