Installing wine with homebrew
Looks like they've already got a workaround:
brew rm libpng
brew install libpng --universal
Then brew install wine. Worked for me a few moments ago. See the linked github issue for more details.
It may also tell you that jpeg was not installed with --universal. You can just do: brew rm jpeg ...and then: brew install jpeg --universal to re-install it universally. Not sure if there are other dependencies or not...But that's one that I got.