wrong offset in sfDoctrinePager

as reported in symfony http://trac.symfony-project.org/ticket/8979

In sfDoctrinePager::init() the offset for the query is determined by the statement:

$offset = ($this->getPage() - 1) * $this->getMaxPerPage()

Immediately after that, the $this->lastPage value is set:

$this->setLastPage(ceil($this->getNbResults() / $this->getMaxPerPage()));

However, sfPager::setLastPage() corrects the page number ($this->page) in case $this->getPage() > $this->lastPage.

Thus, the calculation of the offset should happen after the $this->setLastPage(...) statement, because $this->getPage() is used.

The attached patch (in symfony trac) moves the $offset = ... below the $this->setLastPage(...) line.