a11y: Drop redundant call to get VCLXAccessibleComponent context

VCLXAccessibleComponent by now implements both,
the XAccessible and XAccessibleContext interfaces,
so calling VCLXAccessibleComponent::getAccessibleContext
(implemented in the OAccessibleComponentHelper base class)
is redundant.

Change-Id: I1cee73b042ec38612bee0cc97590d58faccb96d4
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/185850
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
Tested-by: Jenkins

vcl/unx/gtk3/a11y/atkwrapper.cxx

@@ -1037,9 +1037,8 @@ atk_object_wrapper_new( const css::uno::Reference< css::accessibility::XAccessib
         }
 
         // tdf#141197 if we have a sysobj child then include that in the hierarchy
-        rtl::Reference<VCLXAccessibleComponent> pVCLAccComponent
-            = dynamic_cast<VCLXAccessibleComponent*>(rxAccessible->getAccessibleContext().get());
-        if (pVCLAccComponent.is())
+        if (VCLXAccessibleComponent* pVCLAccComponent
+            = dynamic_cast<VCLXAccessibleComponent*>(rxAccessible.get()))
         {
             VclPtr<vcl::Window> xWindow = pVCLAccComponent->GetWindow();
             if (xWindow && xWindow->GetType() == WindowType::SYSTEMCHILDWINDOW)

winaccessibility/source/service/AccFrameEventListener.cxx

@@ -78,8 +78,8 @@ void AccFrameEventListener::HandleChildChangedEvent(Any oldValue, Any newValue)
     {
         if(xChild.is())
         {
-            VCLXAccessibleComponent* pVCLAccComponent = dynamic_cast<VCLXAccessibleComponent*>(
-                m_xAccessible->getAccessibleContext().get());
+            VCLXAccessibleComponent* pVCLAccComponent
+                = dynamic_cast<VCLXAccessibleComponent*>(m_xAccessible.get());
             assert(pVCLAccComponent);
             const SystemEnvData* systemdata = pVCLAccComponent->GetWindow()->GetSystemData();