Resolves: tdf#93818 crash on loading certain lwp

Change-Id: I11f523a0936b843155f3b47139d0fc58d4d0342b
(cherry picked from commit cc127354)
Reviewed-on: https://gerrit.libreoffice.org/19242Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>

lotuswordpro/source/filter/lwpfrib.cxx

@@ -249,10 +249,14 @@ void LwpFrib::RegisterStyle(LwpFoundry* pFoundry)
     XFTextStyle* pStyle = NULL;
     m_StyleName.clear();
     XFStyleManager* pXFStyleManager = LwpGlobalMgr::GetInstance()->GetXFStyleManager();
+    XFTextStyle* pNamedStyle = nullptr;
     if (m_pModifiers->HasCharStyle)
     {
-        XFTextStyle* pNamedStyle = static_cast<XFTextStyle*>
+        pNamedStyle = static_cast<XFTextStyle*>
                                 (pFoundry->GetStyleManager()->GetStyle(m_pModifiers->CharStyleID));
+    }
+    if (pNamedStyle)
+    {
         if (m_pModifiers->FontID)
         {
             pStyle = new XFTextStyle();