* Follow-up to c154fe1.

src/map/battle.c

@@ -5188,7 +5188,7 @@ struct Damage battle_calc_magic_attack(struct block_list *src,struct block_list
 			 * RE MDEF Reduction
 			 * Damage = Magic Attack * (1000+eMDEF)/(1000+eMDEF) - sMDEF
 			 **/
-			if (mdef < -100)
+			if (mdef < -99)
 				mdef = -99; // Avoid divide by 0
 
 			ad.damage = ad.damage * (1000 + mdef) / (1000 + mdef * 10) - mdef2;