writerfilter: make sure the redline stack always has at least one element

One element is pushed to that stack in the constructor, so calling top()
on it always OK, as long as we check during pop() that the stack won't
be empty.

Change-Id: I010bd77897ab2a3684e7d9c5c0450e7bda626fc0

1 files changed, 5 insertions, 0 deletions

diff --git a/writerfilter/source/dmapper/DomainMapper_Impl.cxx b/writerfilter/source/dmapper/DomainMapper_Impl.cxx
index cc1dfba29550..fb7b8fc44253 100644
--- a/writerfilter/source/dmapper/DomainMapper_Impl.cxx
+++ b/writerfilter/source/dmapper/DomainMapper_Impl.cxx
@@ -1635,6 +1635,11 @@ void DomainMapper_Impl::PopFootOrEndnote()
     if (!m_aTextAppendStack.empty())
         m_aTextAppendStack.pop();
 
+    if (m_aRedlines.size() == 1)
+    {
+        SAL_WARN("writerfilter", "PopFootOrEndnote() is called without PushFootOrEndnote()?");
+        return;
+    }
     m_aRedlines.pop();
 }