Revert "Improve handling of errors in lua functions and speed up calls. (#1427)"

This reverts commit f10e3ae36a.

(it was a joke PR, do not fear)

src/Screen.cpp

@@ -360,7 +360,8 @@ bool Screen::PassInputToLua(const InputEventPlus& input)
 	{
 		callback->second.PushSelf(L);
 		lua_pushvalue(L, -2);
-		LuaHelpers::RunScriptOnStack(L, 1, 1);
+		RString error= "Error running input callback: ";
+		LuaHelpers::RunScriptOnStack(L, error, 1, 1, true);
 		handled= lua_toboolean(L, -1);
 		lua_pop(L, 1);
 	}