Clearing up some memory to prevent stupid issues

Preparing for some optimisations. (absolutely need to reduce the ammount of allocations done.)

source/include/intersect.h

@@ -21,6 +21,7 @@ private:
 public:
     Intersect();
     ~Intersect();
+    void reset();
     void add(Intersection i);
     int count() { return this->num; };
     Intersection operator[](const int p) { return *this->list[p]; }

source/include/list.h

@@ -31,6 +31,14 @@ public:
         if (p == nullptr) { return; }
 
         /* clear up the list */
+        do
+        {
+            ChainList *next = p->next;
+            free(p);
+            p = next;
+        }
+        while(p != nullptr);
+
     }
 
     Shape *last()