The chances are lower even than for naga as I believe that centaurs occur more frequently than naga. As I've been completely disregarding the Snake Pit I could be entirely wrong.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@2260 c06c8d41-db1a-0410-9941-cceddc491573
TWEM24A2NO7BPI7L5RDLY45UH5BY7ESNSSJ5TJLLCD7YUJSDCQ6AC break;// centaurs sometimes wear bardingcase MONS_CENTAUR:case MONS_CENTAUR_WARRIOR:case MONS_YAKTAUR:case MONS_YAKTAUR_CAPTAIN:item_race = MAKE_ITEM_NO_RACE;if ( one_chance_in( mon->type == MONS_CENTAUR ? 1000 :mon->type == MONS_CENTAUR_WARRIOR ? 500 :mon->type == MONS_YAKTAUR ? 300/* mon->type == MONS_YAKTAUR_CAPTAIN ? */ : 200)){mitm[bp].base_type = OBJ_ARMOUR;mitm[bp].sub_type = ARM_CENTAUR_BARDING;}