Commit 8f1b3744e52b2adb6475c3cd7a07ff9331e9c2fa

Mark Adler 2015-10-04T11:45:00

Use a consistent and more modern approach to not use a parameter. A remarkably creative and diverse set of approaches to letting the compiler know that opaque was being used when it wasn't is changed by this commit to the more standard (void)opaque.