Use app_malloc; two missing cases.

Reviewed-by: Matt Caswell <matt@openssl.org>
diff --git a/apps/apps.c b/apps/apps.c
index c7e01b0..1d3c66a 100644
--- a/apps/apps.c
+++ b/apps/apps.c
@@ -2633,7 +2633,7 @@
         return;
     if (numfds == 0)
         return;
-    fds = OPENSSL_malloc(sizeof(OSSL_ASYNC_FD) * numfds);
+    fds = app_malloc(sizeof(OSSL_ASYNC_FD) * numfds, "allocate async fds");
     if (!SSL_get_all_async_fds(s, fds, &numfds)) {
         OPENSSL_free(fds);
     }