Rationalizing the use of scan_radius and making it accessible

luprex/core/lua/login.lua

@@ -12,3 +12,8 @@ function setfoo(n)
     tangible.nopredict()
     tangible.actor().inventory.foo = n
 end
+
+function buildq()
+    return tangible.build{class="login", x=10, y=0, z=0, plane="nowhere", graphic="what"}
+end
+