Fix breakage of SQLite ResultWrapper due to r45769. The "result" member in SQLite...

Fix breakage of SQLite ResultWrapper due to r45769. The "result" member in SQLite is actually an array and so passing by value to DatabaseSqlite::fetchObject() makes it fail to iterate. We can't really pass it by reference since that's an E_STRICT error due to a parameter type mismatch with Database. Pass the ResultWrapper instead.

This means that nothing at all should be passing bare result objects/arrays to Database*::fetchObject() anymore. The "instanceof ResultWrapper" logic can be removed in a subsequent commit. It can stay in this one for now for safer backport to 1.15.