Setting default Value of border in RTE "table" to 0 is not showing as 0 once opening RTE Table dialog , other value like 1 , 2 etc. are showing when set default

Hi All , 

I wanted to save default value of border as 0 in table plugin of RTE , so whenever RTE opens and click on Table , border should be shown as 0 instead of 1 which is default value in TablePlugin.js

To achieve this I added following code :

However once I open rte dialog and click on Table , there is no value 0 shown for border . Border textfield is blank .  

If I set other values like 2, 3, 4 etc. in default values , then I open RTE dialog and table  border is not blank and shows values as 2,3 etc. whatever set in default values .

Can anyone let me know why it is only happening for "0" and how can I fix it .

Thanks.