guard against corrupt ObjIndexData

Change-Id: I214991e5d34c8e335cdd8ea482f8fa4913ba637b
(cherry picked from commit c88a23b9)
Reviewed-on: https://gerrit.libreoffice.org/20501Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

lotuswordpro/source/filter/lwpidxmgr.cxx

@@ -213,7 +213,7 @@ void LwpIndexManager::ReadObjIndexData(LwpObjectStream* pObjStrm)
             vObjIndexs[k]->offset = pObjStrm->QuickReaduInt32();
 
         for (k = 0; k < LeafCount; k++)
-            m_TempVec[k] = pObjStrm->QuickReaduInt32();
+            m_TempVec.at(k) = pObjStrm->QuickReaduInt32();
     }
 
     for( sal_uInt16 j=0; j<LeafCount; j++ )

lotuswordpro/source/filter/lwpobjstrm.cxx

@@ -169,7 +169,7 @@ sal_uInt16 LwpObjectStream::QuickRead(void* buf, sal_uInt16 len)
     memset(buf, 0, len);
     if( len > m_nBufSize - m_nReadPos )
     {
-        assert(false);
+        SAL_WARN("lwp", "read request longer than buffer");
         len = m_nBufSize - m_nReadPos;
     }
     if( m_pContentBuf && len)