[libvirt] [PATCH] snapshot: fix memory leak on error

[Eric Blake]

Leak introduced in commit 0436d32.  If we allocate an actions array,
but fail early enough to never consume it with the qemu monitor
transaction call, we leaked memory.

* src/qemu/qemu_driver.c (qemuDomainSnapshotCreateDiskActive):
Free actions array on failure.
---
 src/qemu/qemu_driver.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index b29029e..a214593 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -10132,6 +10132,8 @@ qemuDomainSnapshotCreateDiskActive(virConnectPtr conn,
     if (actions) {
         if (ret == 0)
             ret = qemuMonitorTransaction(priv->mon, actions);
+        else
+            virJSONValueFree(actions);
         if (ret < 0) {
             /* Transaction failed; undo the changes to vm.  */
             bool need_unlink = !(flags & VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT);
-- 
1.7.7.6