mass action stopped working

-- HikaShop version -- : 2.6.0
-- Joomla version -- : 2.5.24
-- PHP version -- : 5.5.12

Hello

I was running an hourly mass action on price_value
the price of all products (3 products)was getting lower by a fixed amount

After having done the update from 2.5 to 2.6.0 the action stopped working

information message is attached

Hi

I have cheched ...... and with integers the action works ..... and it does not work with decimal numbers

Hi,

Please try to use that string: "price.price_value-0.2" instead of "-0.2".

Hi

I have tried but it still fails working.

Please take a look at the second attached file .......I used a modified string just to make try with a value > 1
The information comes the same but tab is 1 .......

Hi

Anyway I have got a message from a friend of mine and it may be useful for other user :
belew is the message :

Hi,

Thanks for the report, please edit the file "administator/components/com_hikashop/classes/massaction.php" and in the function "updateValuesSecure()" replace:

$symbols = array('%','+','-','/','*','(',')');

$symbols = array('%','+','-','/','*','(',')','.');