Revert "fftester: empty tabbox protection"

This reverts commit da8583e9ae9dd7085e463b289533d2eeeccd761c.

This should also be covered by commit
dc83b3ae470914dbcb08fe1f0a4a4e1a1d3d8e19.

Change-Id: I173eb3e7f51288574e4807553200a9ca59a45fef
diff --git a/sw/source/core/docnode/ndtbl.cxx b/sw/source/core/docnode/ndtbl.cxx
index 0abfc39..5310662 100644
--- a/sw/source/core/docnode/ndtbl.cxx
+++ b/sw/source/core/docnode/ndtbl.cxx
@@ -1330,8 +1330,7 @@ lcl_SetTableBoxWidths2(SwTable & rTable, size_t const nMaxBoxes,
    for (size_t nTmpLine = 0; nTmpLine < rLines.size(); ++nTmpLine)
    {
        SwTableBoxes & rBoxes = rLines[nTmpLine]->GetTabBoxes();
        if (rBoxes.empty())
            continue;
        assert(!rBoxes.empty()); // ensured by convertToTable
        size_t const nMissing = nMaxBoxes - rBoxes.size();
        if (nMissing)
        {