* Changed Argument: Check for is_object($result) instead of $result !== NULL prevents fatal error; empty result should be catched anyway
* Change: The database handler is now injected to the Typo3DbBackend (for better testability)
* bindVariable() uses now a unique variable name; resolves #3885
* Typo3DbBackend: the variable $sql (and its subparts) are now initialized as arrays (related to #3885 and #3826)
* Typo3DbBackend: Implemented a class variable $useEnableFields (by now only used for better testability)