More explicit and defensive code so if the init fails we know we handling this…

More explicit and defensive code so if the init fails we know we handling this pointer safely, because  rc_config_init will free the pointer if there was a problem, but it will not set the pointer to NULL.

src/mod/xml_int/mod_xml_radius/mod_xml_radius.c

@@ -55,6 +55,7 @@ switch_status_t mod_xml_radius_new_handle(rc_handle **new_handle, switch_xml_t x
 	}
 
 	if ( rc_config_init(*new_handle) == NULL ) {
+		*new_handle = NULL;
 		goto err;
 	}