CS:S Mapchoose by max_rounds

[Trice1984]

when selecting max_rounds, plugin error says:

[umc-endvote.smx] Unable to create end of map vote time-trigger, trigger time already passed.
[umc-endvote.smx] End of map vote will appear after 17 more rounds.

Is it difficult to simply program the option in the umc-endvote.sp times extend from the .sp file? Then the error would be gone and it would help many people who use max_rounds in their games?
so :

new Handle:cvar_extend_time = INVALID_HANDLE; this, and this =
cvar_extend_time = CreateConVar(
"sm_umc_endvote_extend_timestep",
"15",
"Specifies how many more minutes each extension adds to the time limit.",
0, true, 1.0
);

I don't know much about it, but maybe someone kindly can do it?

Many Thanks