[gnome-db] hint and a possible bug

[Andrea Zagli <azagli libero it>]

on gda-sql: (v. 4.0.7)

- HINT: when you execute a ddl query (for example "drop table") i  
think it must automatically execute the command "\meta"

- POSSIBLE BUG: if you execute "delete from xxx" it returns the number  
of deleted records (it's right); if after you execute "drop table xxx"  
it returns again the number of deleted records of the previous  
operation (it's wrong) (and if you execute other ddl queries it do the  
same) (i tried only with an sqlite db)