system catalog pg_rewrite column ev_attr document description problem

Hi, 

system catalog pg_rewrite column ev_attr document description as shown below


ev_attr  - The column this rule is for (currently, always zero to indicate
the whole table) 


But In the code the column value is always set as -1. can we change the
column description as below is fine? 

ev_attr  - The column this rule is for, presently this value is -1. 

Regards, 
Hari babu.