Update numbering-rows.mb

doc/emc/numbering-rows.mb

@@ -12,13 +12,13 @@
 ```javascript
 function numericTable(tableID,cmpID){
     var tbl = model.playerModel.getModelWithId(""+tableID);
-    tbl.modelBlocks.forEach(function(item, key){
-        try{
+    try{
+        model.playerModel.getModelWithId(""+cmpID).setValue(""+tbl.modelBlocks.length);
+    }catch(Exception){ 
+        tbl.modelBlocks.forEach(function(item,key){
             model.playerModel.getModelWithId(""+cmpID,""+tbl.asfProperty.id,item.tableBlockIndex).setValue(""+parseInt(++key));
-        }catch(Exception){
-            model.playerModel.getModelWithId(""+cmpID).setValue(""+parseInt(++key));
-        }
-    });
+        });
+    }
     if(('numericCode' in tbl) === false){
         tbl.on('tableRowAdd',function(){numericTable(tableID,cmpID);});
         tbl.on('tableRowDelete',function(){numericTable(tableID,cmpID);});