Cosmetics: Add missing backslashes inside #defines
In all other multi-line comments inside #define
there's a backslash
at the end of the line just in case compiler strips comments after
running preprocessor, and also to shut up some code highlighting
editors (that's how I discovered this bug in the first place: #define
took precedence over multi-line comment and lack of backshlash caused
incorrect code highlighting). Now it's more consistent with the rest
of the code. Quick grep didn't find any other affected files.