Yet another one undefined comparison of 'const' and a 'non-const' iterators (hope the last one)

Change-Id: Iefcd1f5561e5a8cac4152f16e72e8f628e9204a5
Reviewed-on: https://gerrit.libreoffice.org/8223Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sfx2/source/control/dispatch.cxx

@@ -2416,7 +2416,7 @@ sal_Bool SfxDispatcher::IsUpdated_Impl() const
 void SfxDispatcher::SetDisableFlags( sal_uInt32 nFlags )
 {
     pImp->nDisableFlags = nFlags;
-    for ( SfxShellStack_Impl::const_reverse_iterator it = pImp->aStack.rbegin(); it != pImp->aStack.rend(); ++it )
+    for ( SfxShellStack_Impl::reverse_iterator it = pImp->aStack.rbegin(); it != pImp->aStack.rend(); ++it )
         (*it)->SetDisableFlags( nFlags );
 }