🐛 Fix warp list crashing if no warp found

modules/gui/warp-list.lua

@@ -793,6 +793,7 @@ Event.on_nth_tick(math.floor(60/config.update_smoothing), function()
                 end
             end
             
+            if closest_warp then
               -- Check the dist to the closest warp
               local in_range = closest_warp.warp_id == warp_ids.spawn and closest_distance < rs2 or closest_distance < r2
               if was_in_range and not in_range then
@@ -814,7 +815,7 @@ Event.on_nth_tick(math.floor(60/config.update_smoothing), function()
                   add_warp_element.enabled = false
                   add_warp_element.tooltip = {'warp-list.too-close', closest_warp.name}
               end
-
+            end
         end
 
     end