CID#736197 out of bounds

Change-Id: I9b105926b812e4341700d87d77288fe429beda53

sw/source/core/txtnode/ndtxt.cxx

@@ -2729,7 +2729,15 @@ long SwTxtNode::GetLeftMarginWithNum( sal_Bool bTxtLeft ) const
     const SwNumRule* pRule = GetNum() ? GetNum()->GetNumRule() : 0L;
     if( pRule )
     {
-        const SwNumFmt& rFmt = pRule->Get(static_cast<sal_uInt16>(GetActualListLevel()));
+        int nLevel = GetActualListLevel();
+
+        if (nLevel < 0)
+            nLevel = 0;
+
+        if (nLevel >= MAXLEVEL)
+            nLevel = MAXLEVEL - 1;
+
+        const SwNumFmt& rFmt = pRule->Get(static_cast<sal_uInt16>(nLevel));
 
         if ( rFmt.GetPositionAndSpaceMode() == SvxNumberFormat::LABEL_WIDTH_AND_POSITION )
         {