Has this DB been correctly opened?

To know if it has been closed or interrupted, you must check for errors with error.

Property definitions

sqlite3 $ NativeSqlite3 :: is_valid
	# Has this DB been correctly opened?
	#
	# To know if it has been closed or interrupted, you must check for errors with `error`.
	fun is_valid: Bool do return not address_is_null
lib/sqlite3/native_sqlite3.nit:148,2--151,49