Working on CommonUI conversion. Need to stop using SetAnchorsInViewport as way to position widgets, so now implementing new thing using GridPanels.

luprex/lua/login.lua

@@ -31,7 +31,11 @@ end
 
 function engio.getlookat()
     local class = tangible.getclass(tangible.place())
-    if class == nil then return end
+
+    -- if the tangible is not of any class, return empty string.
+    if class == nil then
+        return ""
+    end
 
     -- if the class has a function 'lookhotkeys', then the correct
     -- look-at widget is 'hotkeys'.  We're going to automatically 
@@ -47,5 +51,8 @@ function engio.getlookat()
     if class.getlookat ~= nil then
         return class.getlookat()
     end
+
+    -- by default, return the empty string.
+    return ""
 end