tree-wide: move variables to innermost scope

src/core/cgroup.c

@@ -203,12 +203,10 @@ void cgroup_context_remove_bpf_foreign_program(CGroupContext *c, CGroupBPFForeig
 }
 
 void cgroup_context_remove_socket_bind(CGroupSocketBindItem **head) {
-        CGroupSocketBindItem *h;
-
         assert(head);
 
         while (*head) {
-                h = *head;
+                CGroupSocketBindItem *h = *head;
                 LIST_REMOVE(socket_bind_items, *head, h);
                 free(h);
         }