[gnome-sudoku] Avoid casting to int[] in count_solutions_limited()

[Michael Catanzaro <mcatanzaro src gnome org>]

commit a620876f5d698399148661d1e2d5eb5b0cbde77e
Author: Steven Elliott <selliott512 gmail com>
Date:   Sun Jul 24 14:54:51 2022 -0400

    Avoid casting to int[] in count_solutions_limited()

 lib/sudoku-board.vala | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/lib/sudoku-board.vala b/lib/sudoku-board.vala
index 661bfa3..bed0be7 100644
--- a/lib/sudoku-board.vala
+++ b/lib/sudoku-board.vala
@@ -393,7 +393,9 @@ public class SudokuBoard : Object
 
     public int count_solutions_limited ()
     {
-        return QQwing.count_solutions_limited ((int[]) cells);
+        int[] cells_1d = convert_2d_to_1d(cells);
+
+        return QQwing.count_solutions_limited (cells_1d);
     }
 
     public Set<Coord?> get_occurances(Gee.List<Coord?> coords, int val)