harrydeluxe/php-liquid — pull request #10 by v1o (2012-03-02 11:33:59+00:00)
Title: Fixed IF statement when one of the operands is NULL

Hi Harry!

There is a bug in the IF statement that makes the processor return TRUE even if one of the operands does not exist or is NULL.

For example:

```liquid
{% if currency == "EUR" %}TEST{% endif %}
```

will output TEST even if currency is not defined.