CakePHP 1.3: fix 'Unsupported operand types' error

PHP can’t do 'null + array()'
CakePHP 1.3: remove empty choice in select.

Sounds like CakePHP 1.3 include an empty choice by default into these
selection drop downs. We don’t want that.
CakePHP 1.3: restore description metadata.

The meta() function parameters just changed.
CakePHP 1.3: remove empty choice in select (2).

Sounds like CakePHP 1.3 include an empty choice by default into these
selection drop downs. We don’t want that.