use some fancy compiler magic (thanks to Matthew Woehlke on the gcc-help...

use some fancy compiler magic (thanks to Matthew Woehlke on the gcc-help mailing list) to restore type-safety to S_OR by going back to a macro, but preserve the side-effect-safe usage of the macro arguments



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@155967 65c4cc65-6c06-0410-ace0-fbb531ad65f3