workaround weird linking error on tb71

ever since
    commit 9ec8bf8f
    add SvStream::TellEnd

Change-Id: I3043459688e9cee16cdb71137c6808a3365b69f6
Reviewed-on: https://gerrit.libreoffice.org/61869Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>

include/tools/stream.hxx

@@ -273,7 +273,7 @@ public:
     sal_uInt64      Seek( sal_uInt64 nPos );
     sal_uInt64      SeekRel( sal_Int64 nPos );
     sal_uInt64      Tell() const { return m_nBufFilePos + m_nBufActualPos;  }
-    sal_uInt64      TellEnd() { return Tell() + remainingSize();  }
+    sal_uInt64      TellEnd();
     // length between current (Tell()) pos and end of stream
     virtual sal_uInt64 remainingSize();
     void            Flush();

tools/source/stream/stream.cxx

@@ -1911,6 +1911,11 @@ void SvMemoryStream::SetSize(sal_uInt64 const nNewSize)
     ReAllocateMemory( nDiff );
 }
 
+sal_uInt64 SvStream::TellEnd()
+{
+    return Tell() + remainingSize();
+}
+
 //Create a OString of nLen bytes from rStream
 OString read_uInt8s_ToOString(SvStream& rStrm, std::size_t nLen)
 {