[PATCH] Fix case sensitiveness in Image::outputFormat()

[Robby Stephenson]

On Saturday 21 February 2009, Sandor Bodo-Merle wrote:
> So obviously all the jpeg images were put as PNGs in tmpDir, which were
> not showed afterward. The below patch  fix this issue.

Whoa, that's tricky. Thanks for catching it, patch applied.

Robby