Resolved:
//// CHAR / int_guild.cpp
mmo.hpp
#define MAX_GUILD 25 ///Increased max guild members +6 per 1 extension levels [Lupus]
int_guild.cpp
// Set the max number of members, Guild Extention skill - currently adds 6 to max per skill lv.
g->max_member = MAX_GUILD;
if(g->max_member > MAX_GUILD)
// Initialize guild property
g->max_member=25;
g->average_lv=master->lv;
g->connect_member=1;