Use of non type-safe comparison operator causing problems in PHP template

[dylangleason]

I ran into this issue running unit tests against my API - using the loosely-typed comparison opereator != resulted in some weird behavior:

if($offset != null) {
            $queryParams['offset'] = $this->apiClient->toQueryValue($offset);
}

The problem here is that the $offset can have a value of 0, but this check will skip quoting of this value.

This resulted in the API call failing on a SQL statement that instead inserted NULL as the quoted value.

Is there any reason why the template doesn't use the safe comparison operator? See:

https://github.com/wordnik/swagger-codegen/blob/master/src/main/resources/php/api.mustache