QPSql requests TableName excessively when reading resultset from stored-procedures

If I have a Postgre database (I'm using 9.6) that has a stored procedure in the form:

CREATE OR REPLACE FUNCTION public.get_nuid_report(IN _product_id nkey)
  RETURNS TABLE(item_id nkey48, pn text, casn text, nuid text, c_nb text, sn text, csc_n text, ua text, casn12 text) AS[...]

And I use a QSqlQuery with;

select * from {{get_nuid_report(}}X);

I see that QPsql driver sends hundreds of queries to the server, all identical making my software unusable due to its slowness:

SELECT relname FROM pg_class WHERE pg_class.oid = 0

Looking at the driver source, I see that it is trying to get the table name for this query, which is invalid since the OID is zero.

Using the patch attached, where I check if tableOid > 0 before running the query to return the table name, I eliminate the problem altogether.