Fixes potential overflow in script suppression.

src/Battling/ScriptHandling/BattleScript.hpp

@@ -26,7 +26,10 @@ namespace CreatureLib::Battling {
         inline ArbUt::OptionalBorrowedPtr<void> GetOwner() const noexcept { return _owner; }
         inline bool IsSuppressed() const noexcept { return _suppressed > 0; }
         inline void Suppress() { _suppressed++; }
-        inline void Unsuppress() { _suppressed--; }
+        inline void Unsuppress() {
+            if (_suppressed > 0)
+                _suppressed--;
+        }
 
         virtual ~BattleScript() = default;