qemu: Properly report error on uuid mismatch in the migration cookie

Add the missing jump to the error label when the uuid in the
migration cookie XML does not match the uuid of the migrated
domain.
Signed-off-by: NLuyao Huang <lhuang@redhat.com>
Signed-off-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_migration.c

@@ -1147,6 +1147,7 @@ qemuMigrationCookieXMLParse(qemuMigrationCookiePtr mig,
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("Incoming cookie data had unexpected UUID %s vs %s"),
                        tmp, uuidstr);
+        goto error;
     }
     VIR_FREE(tmp);