fix navigate by previous headings does not wrap when cursor position

...is before first heading

unreported bug fix for a patch I made for tdf#115600

Change-Id: I7ccaad387c5ea344cda71d3cc1f185e590a1f586
Reviewed-on: https://gerrit.libreoffice.org/54059Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

sw/source/core/crsr/crstrvl.cxx

@@ -992,7 +992,8 @@ bool SwCursorShell::GotoPrevOutline()
     SwNode* pNd = &(pCursor->GetNode());
     SwOutlineNodes::size_type nPos;
     bool bRet = false;
-    if ( rNds.GetOutLineNds().Seek_Entry(pNd, &nPos) && nPos == 0 )
+    rNds.GetOutLineNds().Seek_Entry(pNd, &nPos);
+    if ( nPos == 0 )
     {
         nPos = rNds.GetOutLineNds().size();
         SvxSearchDialogWrapper::SetSearchLabel( SearchLabel::StartWrapped );