bcosca/fatfree — pull request #174 by xfra35 (2012-11-23 14:41:15+00:00)
Title: Bug fix: png transparency in Graphics::thumb

I've been encountering several times transparency issues when using Graphics::thumb on PNG image files.
I thought I was facing GD limitations until I found that it was possible to switch from single-color transparency to full alpha channel with [imagesavealpha](http://www.php.net/manual/en/function.imagesavealpha.php).

I think it could be beneficial to include it in Graphics::thumb.