qemu: migration: Forbid only remote migration if autodestroy is active for VM

Semantically we can't guarantee that we'll be able to destroy the VM on
the remote host, thus we can't allow remote migration. All other forms
of migration (e.g. saving to file) are okay though as they don't clash
with semantics of the flag.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

src/qemu/qemu_migration.c

@@ -1155,7 +1155,8 @@ qemuMigrationSrcIsAllowed(virQEMUDriverPtr driver,
 
     /* following checks don't make sense for offline migration */
     if (!(flags & VIR_MIGRATE_OFFLINE)) {
-        if (qemuProcessAutoDestroyActive(driver, vm)) {
+        if (remote &&
+            qemuProcessAutoDestroyActive(driver, vm)) {
             virReportError(VIR_ERR_OPERATION_INVALID,
                            "%s", _("domain is marked for auto destroy"));
             return false;