tdf#158556 speedup docx load

move the vector outside the loop, avoid repeated allocations

Change-Id: Ic6ef95a966ffd5c4115ea56e63af1494e7937928
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/165270
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
diff --git a/sw/source/core/docnode/nodes.cxx b/sw/source/core/docnode/nodes.cxx
index 5f059f9..76f9362 100644
--- a/sw/source/core/docnode/nodes.cxx
+++ b/sw/source/core/docnode/nodes.cxx
@@ -2320,6 +2320,7 @@ void SwNodes::RemoveNode( SwNodeOffset nDelPos, SwNodeOffset nSz, bool bDel )
#ifndef NDEBUG
    SwNode *const pFirst((*this)[nDelPos]);
#endif
    std::vector<SwTextAttr*> flys;
    for (SwNodeOffset nCnt(0); nCnt < nSz; nCnt++)
    {
        SwNode* pNode = (*this)[ nDelPos + nCnt ];
@@ -2332,11 +2333,11 @@ void SwNodes::RemoveNode( SwNodeOffset nDelPos, SwNodeOffset nSz, bool bDel )
            // so their anchor still points to correct node when deleted!
            // NOTE: this will call RemoveNode() recursively!
            // so adjust our indexes to account for removed nodes
            SwNodeOffset const nPos = pTextNd->GetIndex();
            SwpHints *const pHints(pTextNd->GetpSwpHints());
            if (pHints)
            {
                std::vector<SwTextAttr*> flys;
                SwNodeOffset const nPos = pTextNd->GetIndex();
                flys.clear();
                for (size_t i = 0; i < pHints->Count(); ++i)
                {
                    SwTextAttr *const pHint(pHints->Get(i));