fix: added default initializers for projectile pool fields

src/projectile_pool.hpp

@@ -16,12 +16,11 @@ public:
 
     Node3D *claim_projectile();
     void return_projectile(Node3D *node);
-
 protected:
     Node3D *instantiate_new() const;
 private:
-    Ref<WeaponData> data;
-    size_t count;
+    Ref<WeaponData> data{};
+    size_t count{0};
     Vector<Node3D*> active{};
     Vector<Node3D*> inactive{};
 };