CHAOS: prevent sorcery object with null id

When allocating a sorcery object, fail if the
id value was not allocated.

ASTERISK-25323
Reported by: Scott Griepentrog

Change-Id: I152133fb7545a4efcf7a0080ada77332d038669e

main/sorcery.c

@@ -1736,6 +1736,10 @@ void *ast_sorcery_alloc(const struct ast_sorcery *sorcery, const char *type, con
 	} else {
 		details->object->id = ast_strdup(id);
 	}
+	if (!details->object->id) {
+		ao2_ref(details, -1);
+		return NULL;
+	}
 
 	ast_copy_string(details->object->type, type, sizeof(details->object->type));