[gnome-db] oracle: statements with parameters don't work

as the subject

gda_connection_statement_execute_select returns an error (ora-1722 if  
i use a parameter of type guint) or a datamodel with no rows (with  
parameters of others types) (same things with gda-browser)

but gda_statement_to_sql_extended returns the right sql string

i'm using libgda 4.2.x trunk under windows

thanks in advance