examples: fix sqlite.v

examples/database/sqlite.v

@@ -1,22 +1,22 @@
 import sqlite
 
 fn main() {
-	db := sqlite.connect(':memory:')
+	db := sqlite.connect(':memory:')?
 	db.exec("create table users (id integer primary key, name text default '');")
-	
+
 	db.exec("insert into users (name) values ('Sam')")
 	db.exec("insert into users (name) values ('Peter')")
 	db.exec("insert into users (name) values ('Kate')")
-	
+
 	nr_users := db.q_int('select count(*) from users')
 	println('nr users = $nr_users')
-	
+
 	name := db.q_string('select name from users where id = 1')
 	assert name == 'Sam'
-	
+
 	users, code := db.exec('select * from users')
 	println("SQL Result code: $code")
 	for row in users {
 		println(row.vals)
-	}	
+	}
-}	
+}