conf: Properly report error when an unsupported chr device name is passed

Add the missing jump to thje error label. The error message shouldn't
ever be triggered though as it's called only on pre-selected nodes.

Signed-off-by: Luyao Huang <lhuang@redhat.com>

src/conf/domain_conf.c

@@ -8609,6 +8609,7 @@ virDomainChrDefParseXML(xmlXPathContextPtr ctxt,
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                        _("unknown character device type: %s"),
                        nodeName);
+        goto error;
     }
 
     cur = node->children;