creature codex part 4

control.lua

@@ -11,7 +11,7 @@ _G.gui_events = {
 	[defines.events.on_gui_selected_tab_changed] = {},
 	[defines.events.on_gui_switch_state_changed] = {}
 }
-function _G.process_gui_event(event)
+local function process_gui_event(event)
 	if event.element and event.element.valid then
 		for pattern, f in pairs(gui_events[event.name]) do
 			if event.element.name:match(pattern) then f(event); return end