[gnome-tetravex] Fix a crash.

[Arnaud B. <arnaudb src gnome org>]

commit 1180d0666d6f9b1eacd36d265c9db695186c1fd2
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sat Sep 21 04:29:40 2019 +0200

    Fix a crash.
    
    Introduced by Undo work.

 src/puzzle.vala | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/puzzle.vala b/src/puzzle.vala
index 07122f2..cc6390c 100644
--- a/src/puzzle.vala
+++ b/src/puzzle.vala
@@ -256,6 +256,9 @@ private class Puzzle : Object
         if (t1 != null)
             tile_moved ((!) t1, x0, y0);
 
+        if (!undoing_or_redoing)
+            add_to_history (x0, y0, x1, y1);
+
         if (check_if_solved ())
         {
             stop_clock ();
@@ -273,9 +276,6 @@ private class Puzzle : Object
             is_solved_right = true;
         else if (is_solved_right)
             is_solved_right = false;
-
-        if (!undoing_or_redoing)
-            add_to_history (x0, y0, x1, y1);
     }
 
     /*\