[gnome-db] Little problem in MySQL provider

[Gonzalo Paniagua Javier <gonzalo gnome-db org>]

	Hello!

	I've just seen that may be there is a problem in
	gda-mysql-recordset.c (fetch_func()). 
	
	What happens if the type returned by gda_mysql_type_to_gda() (in
	utils.c) is GDA_TYPE_UNKNOWN? Well, you get a GdaField that has
	type unknown and a string value!!! Is this ok? Or the default
	return value in gda_mysql_type_to_gda() should be a
	GDA_TYPE_STRING?