Fix crash with proxy that has no subproxies

src/generator.c

@@ -2446,9 +2446,11 @@ static void delete_proxy(ckpool_t *ckp, gdata_t *gdata, proxy_instance_t *proxy)
 			HASH_DELETE(sh, proxy->subproxies, subproxy);
 		mutex_unlock(&proxy->proxy_lock);
 
-		send_stratifier_deadproxy(ckp, subproxy->id, subproxy->subid);
+		if (subproxy) {
-		if (subproxy && proxy != subproxy)
+			send_stratifier_deadproxy(ckp, subproxy->id, subproxy->subid);
-			store_proxy(gdata, subproxy);
+			if (proxy != subproxy)
+				store_proxy(gdata, subproxy);
+		}
 	} while (subproxy);
 
 	/* Recycle the proxy itself */