Check error code from a2d_ASN1_OBJECT().

crypto/objects/obj_dat.c

@@ -654,6 +654,8 @@ int OBJ_create(const char *oid, const char *sn, const char *ln)
 		return(0);
 		}
 	i=a2d_ASN1_OBJECT(buf,i,oid,-1);
+	if (i == 0)
+		goto err;
 	op=(ASN1_OBJECT *)ASN1_OBJECT_create(OBJ_new_nid(1),buf,i,sn,ln);
 	if (op == NULL) 
 		goto err;