From a70d93e2266ee5ca829cb387ac1fcd2096ac3e63 Mon Sep 17 00:00:00 2001
From: Peter Krempa <pkrempa@redhat.com>
Date: Wed, 22 Oct 2014 11:27:36 +0200
Subject: [PATCH] qemu: migration: Make check for empty hook XML robust

Also consider whitespace only strings returned from the hook as empty
result.

(cherry picked from commit 19b1ee42b49b2764f7df23787f4b6022886a612c)
---
 src/qemu/qemu_migration.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 284cd5adbf..2a96661a01 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -2570,7 +2570,7 @@ qemuMigrationPrepareAny(virQEMUDriverPtr driver,
         if (hookret < 0) {
             goto cleanup;
         } else if (hookret == 0) {
-            if (!*xmlout) {
+            if (virStringIsEmpty(xmlout)) {
                 VIR_DEBUG("Migrate hook filter returned nothing; using the"
                           " original XML");
             } else {