Fix crash on book status change (#5453)

5 years ago · 7badb67e3d
parent 529d2d91d6
commit 7badb67e3d
1 changed files with 3 additions and 1 deletions
--- a/frontend/ui/widget/toggleswitch.lua
+++ b/frontend/ui/widget/toggleswitch.lua
@ -217,7 +217,9 @@ function ToggleSwitch:onTapSelect(arg, gev)
        self.config:onConfigEvents(self.events, self.position)
    end
    --]]
-    self.callback(self.position)
+    if self.callback then
+        self.callback(self.position)
+    end
    if self.toggle[self.position] ~= "⋮" then
        self.config:onConfigChoose(self.values, self.name,
            self.event, self.args, self.events, self.position, self.delay_repaint)