Repaired a bug : a variable was not declared before it was used in interfaces.py take_damage

squirrelbattle/interfaces.py

@@ -774,6 +774,7 @@ class FightingEntity(Entity):
         The entity takes damage from the attacker
         based on their respective stats.
         """
+        damage = 0
         if amount != 0 :
             damage = max(1, amount - self.constitution)
         self.health -= damage