valgrind: use of unit value exporting tdf107162-1.ots to xls

Conditional jump or move depends on uninitialised value(s)
   at 0x4554B657: SetApiUnderline (xlstyle.cxx:487)
   by 0x4554B657: (anonymous namespace)::lclSetApiFontSettings(XclFontData&, rtl::OUString const&, float, float, com::sun::star::awt::FontSlant, short, short) (xlstyle.cxx:583)
   by 0x4554C096: XclFontPropSetHelper::ReadFontProperties(XclFontData&, ScfPropertySet const&, XclFontPropSetType, short) (xlstyle.cxx:679)
   by 0x4546D8BE: XclExpTbxControlObj::XclExpTbxControlObj(XclExpObjectManager&, com::sun::star::uno::Reference<com::sun::star::drawing::XShape> const&, tools::Rectangle const*) (xeescher.cxx:753)
   by 0x45593D99: XclEscherEx::CreateTBXCtrlObj(com::sun::star::uno::Reference<com::sun::star::drawing::XShape> const&, tools::Rectangle const*) (xcl97esc.cxx:441)
   by 0x45594E85: XclEscherEx::StartShape(com::sun::star::uno::Reference<com::sun::star::drawing::XShape> const&, tools::Rectangle const*) (xcl97esc.cxx:254)
   by 0x44E4FFBC: ImplEESdrWriter::ImplWriteShape(ImplEESdrObject&, EscherSolverContainer&, bool) (eschesdo.cxx:164)
   by 0x44E510C3: ImplEESdrWriter::ImplWriteShape(ImplEESdrObject&, EscherSolverContainer&, bool) (eschesdo.cxx:215)
   by 0x44E5452B: ImplEESdrWriter::ImplWritePage(EscherSolverContainer&) (eschesdo.cxx:848)
   by 0x44E54D27: ImplWriteCurrentPage (eschesdo.cxx:932)
   by 0x44E54D27: EscherEx::AddSdrPage(SdrPage const&) (eschesdo.cxx:945)
   by 0x454696BC: XclExpObjectManager::ProcessDrawing(SdrPage const*) (xeescher.cxx:1523)
   by 0x45407A35: ExcTable::FillAsTableBinary(short) (excdoc.cxx:518)
   by 0x454088B8: ExcDocument::ReadDoc() (excdoc.cxx:767)

Change-Id: Ibefe8ea808bfbd9dfc8e773b4c13936387633507
Reviewed-on: https://gerrit.libreoffice.org/57904
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sc/source/filter/excel/xlstyle.cxx

@@ -659,8 +659,8 @@ void XclFontPropSetHelper::ReadFontProperties( XclFontData& rFontData,
         case EXC_FONTPROPSET_CONTROL:
         {
             OUString aApiFontName;
-            float fApiHeight, fApiWeight;
-            sal_Int16 nApiFamily, nApiCharSet, nApiPosture, nApiUnderl, nApiStrikeout;
+            float fApiHeight(0.0), fApiWeight(0.0);
+            sal_Int16 nApiFamily(0), nApiCharSet(0), nApiPosture(0), nApiUnderl(0), nApiStrikeout(0);
 
             // read font properties
             maHlpControl.ReadFromPropertySet( rPropSet );