Updated Dragon Breath effect

* Concentration no longer increases Dragon Breath damage.

src/map/battle.c

@@ -3290,7 +3290,7 @@ static int battle_calc_attack_skill_ratio(struct Damage wd, struct block_list *s
 			skillratio += 200;
 		if (sc && sc->data[SC_TRUESIGHT])
 			skillratio += 2 * sc->data[SC_TRUESIGHT]->val1;
-		if (sc->data[SC_CONCENTRATION])
+		if (sc->data[SC_CONCENTRATION] && (skill_id != RK_DRAGONBREATH && skill_id != RK_DRAGONBREATH_WATER))
 			skillratio += sc->data[SC_CONCENTRATION]->val2;
 #endif
 		if (sc->data[SC_CRUSHSTRIKE] && (!skill_id || skill_id == KN_AUTOCOUNTER)) {