presenter console: fix STL assert when exiting slide show

AtkListener::handleChildRemoved() calls removeAccessibleEventListener(),
apparently without the listener being registered, so the remove() returns
end(), which isn't valid for erase().

(probably happens since e4e208fa2b0930be5a7cbbe2fab2ff2fe2c4a1ff)

Change-Id: Ia0de1bafe214f5a46f250d6573d8c4b408c9cf26
(cherry picked from commit f6d2ff1cb7f0f4917a0d4df38d5dcff8e37d20cc)
Reviewed-on: https://gerrit.libreoffice.org/31192
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/sdext/source/presenter/PresenterAccessibility.cxx b/sdext/source/presenter/PresenterAccessibility.cxx
index 7c474b288daf..48916ebf025a 100644
--- a/sdext/source/presenter/PresenterAccessibility.cxx
+++ b/sdext/source/presenter/PresenterAccessibility.cxx
@@ -1109,7 +1109,11 @@ void SAL_CALL PresenterAccessible::AccessibleObject::removeAccessibleEventListen
     {
         const osl::MutexGuard aGuard(m_aMutex);
 
-        maListeners.erase(std::remove(maListeners.begin(), maListeners.end(), rxListener));
+        auto const it(std::remove(maListeners.begin(), maListeners.end(), rxListener));
+        if (it != maListeners.end())
+        {
+            maListeners.erase(it);
+        }
     }
 }