Add missing early return

board-server/src/room.rs

@@ -219,6 +219,7 @@ impl Room {
         if diff.is_empty() {
             self.successive_skipped_turns += 1;
             self.next_player();
+            return;
         }
         if !Board::has_alignment(&diff) || !self.board.is_unique_chain(&diff) {
             self.reset_player_moves();