qemu: migration: Properly note that non-shared-storage migration uses a blockjob

Internally we do a 'block-copy' to accomodate non-shared storage
migration but the code did not fill in that the block job was active on
the disk when starting the copy job. Since we handle block jobs finishes
regardless of having it registered it's not a problem but soon will
become one.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_migration.c

@@ -977,6 +977,7 @@ qemuMigrationSrcNBDStorageCopy(virQEMUDriverPtr driver,
 
         VIR_FREE(diskAlias);
         diskPriv->migrating = true;
+        diskPriv->blockjob->started = true;
 
         if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0) {
             VIR_WARN("Failed to save status on vm %s", vm->def->name);