Minor cleanup and perf improvement

src/arena.c

@@ -73,8 +73,6 @@ void *ucl_arena_get(struct ucl_arena *arena) {
     return NULL;
 }
 
-int total_arena_puts = 0;
-
 void ucl_arena_put(struct ucl_arena *arena, void *object) {
     if (object == NULL) {
         return;
@@ -87,9 +85,7 @@ void ucl_arena_put(struct ucl_arena *arena, void *object) {
 
     assert(offset % arena->object_size == 0);
     assert(index < arena->capacity);
-
     assert(arena->used_map[int_index] & (1 << bit_index));
-    total_arena_puts++;
 
     arena->used_map[int_index] &= ~(1 << bit_index);
 

src/scope.c

@@ -40,7 +40,8 @@ struct ucl_object *ucl_scope_get(struct ucl *state, struct ucl_scope *scope, con
         scope = scope->parent;
         cell = ucl_scope_get_cell(scope, name);
     }
-    return ucl_list_nth(cell, DATA_POSITION);
+    // This code is a little hot. No error checking.
+    return cell->cell.cdr->cell.car;
 }
 
 void ucl_scope_put(struct ucl *state, struct ucl_scope *scope, const char *name, struct ucl_object *obj) {