prevent endless loop

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8754 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/apr/memory/unix/apr_pools.c

@@ -1990,7 +1990,12 @@ APR_DECLARE(void) apr_pool_cleanup_kill(apr_pool_t *p, const void *data,
         }
 
         lastp = &c->next;
-        c = c->next;
+
+		if (c == c->next) {
+			c = NULL;
+		} else {
+			c = c->next;
+		}
     }
 }