[gnome-nibbles/arnaudb/rework-warps: 29/33] Add a security.

[Arnaud B. <arnaudb src gnome org>]

commit 96e105c5077200fbaebfeaa0565cb465fa8f4671
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sun Jun 21 23:50:54 2020 +0200

    Add a security.

 src/warp.vala | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/src/warp.vala b/src/warp.vala
index 4ba6850..69b9314 100644
--- a/src/warp.vala
+++ b/src/warp.vala
@@ -23,6 +23,8 @@ private class WarpManager: Object
 {
     private class Warp : Object
     {
+        private bool init_finished = false;
+
         public int id       { internal get; protected construct; }
 
         public int source_x { internal get; protected construct set; }
@@ -46,15 +48,19 @@ private class WarpManager: Object
         }
 
         internal void set_source (int x, int y)
+            requires (init_finished == false)
         {
             source_x = x;
             source_y = y;
+            init_finished = true;
         }
 
         internal void set_target (int x, int y)
+            requires (init_finished == false)
         {
             target_x = x;
             target_y = y;
+            init_finished = true;
         }
     }