Window Leak in BlockerActivity

[seg-ha]

E/WindowManager(27472):
E/WindowManager(27472): android.view.WindowLeaked: Activity cri.sanity.screen.BlockerActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{52cd58c0 V.E..... R.....I. 0,0-704,418} that was originally added here
E/WindowManager(27472): at android.view.ViewRootImpl.(ViewRootImpl.java:346)
E/WindowManager(27472): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:248)
E/WindowManager(27472): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
E/WindowManager(27472): at android.app.Dialog.show(Dialog.java:286)
E/WindowManager(27472): at android.app.AlertDialog$Builder.show(AlertDialog.java:951)
E/WindowManager(27472): at cri.sanity.util.Alert.msg(Alert.java:120)
E/WindowManager(27472): at cri.sanity.util.Alert.msg(Alert.java:98)
E/WindowManager(27472): at cri.sanity.util.Alert.msg(Alert.java:77)
E/WindowManager(27472): at cri.sanity.PrefActivity$1.on(PrefActivity.java:117)
E/WindowManager(27472): at cri.sanity.PrefActivity$Change.onPreferenceChange(PrefActivity.java:38)
E/WindowManager(27472): at android.preference.Preference.callChangeListener(Preference.java:897)
E/WindowManager(27472): at android.preference.TwoStatePreference.onClick(TwoStatePreference.java:66)
E/WindowManager(27472): at android.preference.Preference.performClick(Preference.java:952)
E/WindowManager(27472): at android.preference.PreferenceScreen.onItemClick(PreferenceScreen.java:215)
E/WindowManager(27472): at android.widget.AdapterView.performItemClick(AdapterView.java:299)
E/WindowManager(27472): at android.widget.AbsListView.performItemClick(AbsListView.java:1113)
E/WindowManager(27472): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2911)
E/WindowManager(27472): at android.widget.AbsListView$3.run(AbsListView.java:3645)
E/WindowManager(27472): at android.os.Handler.handleCallback(Handler.java:733)
E/WindowManager(27472): at android.os.Handler.dispatchMessage(Handler.java:95)
E/WindowManager(27472): at android.os.Looper.loop(Looper.java:136)
E/WindowManager(27472): at android.app.ActivityThread.main(ActivityThread.java:5001)
E/WindowManager(27472): at java.lang.reflect.Method.invokeNative(Native Method)
E/WindowManager(27472): at java.lang.reflect.Method.invoke(Method.java:515)
E/WindowManager(27472): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
E/WindowManager(27472): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
E/WindowManager(27472): at dalvik.system.NativeStart.main(Native Method)