From 6b90a8473875eb34bae27856857cf6561e079089 Mon Sep 17 00:00:00 2001
From: Eric Blake <eblake@redhat.com>
Date: Mar 27 2019 13:14:42 +0000
Subject: snapshot: Allow NULL to virDomainSnapshotObjGetDef


Doing so can simplify some callers.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

---

diff --git a/src/conf/snapshot_conf.c b/src/conf/snapshot_conf.c
index 4ce1204..8e4f3d9 100644
--- a/src/conf/snapshot_conf.c
+++ b/src/conf/snapshot_conf.c
@@ -967,7 +967,7 @@ virDomainSnapshotRedefinePrep(virDomainPtr domain,
     }
 
     other = virDomainSnapshotFindByName(vm->snapshots, def->common.name);
-    otherdef = other ? virDomainSnapshotObjGetDef(other) : NULL;
+    otherdef = virDomainSnapshotObjGetDef(other);
     check_if_stolen = other && otherdef->common.dom;
     if (virDomainSnapshotRedefineValidate(def, domain->uuid, other, xmlopt,
                                           flags) < 0) {
diff --git a/src/conf/virdomainsnapshotobjlist.h b/src/conf/virdomainsnapshotobjlist.h
index b83f7a4..12b574b 100644
--- a/src/conf/virdomainsnapshotobjlist.h
+++ b/src/conf/virdomainsnapshotobjlist.h
@@ -87,7 +87,7 @@ int virDomainListSnapshots(virDomainSnapshotObjListPtr snapshots,
 static inline virDomainSnapshotDefPtr
 virDomainSnapshotObjGetDef(virDomainMomentObjPtr obj)
 {
-    return (virDomainSnapshotDefPtr) obj->def;
+    return obj ? (virDomainSnapshotDefPtr) obj->def : NULL;
 }
 
 #endif /* LIBVIRT_VIRDOMAINSNAPSHOTOBJLIST_H */