conf: snapshot: Provide a function to free virDomainSnapshotDiskDefPtr

Tests will need to parse such a definition so it also needs to be freed.
Provide a function for it.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/conf/snapshot_conf.c

@@ -99,6 +99,17 @@ virDomainSnapshotDiskDefClear(virDomainSnapshotDiskDefPtr disk)
     disk->src = NULL;
 }
 
+void
+virDomainSnapshotDiskDefFree(virDomainSnapshotDiskDefPtr disk)
+{
+    if (!disk)
+        return;
+
+    virDomainSnapshotDiskDefClear(disk);
+    VIR_FREE(disk);
+}
+
+
 /* Allocate a new virDomainSnapshotDef; free with virObjectUnref() */
 virDomainSnapshotDefPtr
 virDomainSnapshotDefNew(void)

src/conf/snapshot_conf_priv.h

@@ -30,3 +30,6 @@ virDomainSnapshotDiskDefParseXML(xmlNodePtr node,
                                  virDomainSnapshotDiskDefPtr def,
                                  unsigned int flags,
                                  virDomainXMLOptionPtr xmlopt);
+
+void
+virDomainSnapshotDiskDefFree(virDomainSnapshotDiskDefPtr disk);