[wlug] New Warnings In GCC 6

Couple of interesting blog posts <https://gnu.wildebeest.org/blog/mjw/2016/02/15/looking-forward-to-gcc6-many-new-warnings/>, <https://gnu.wildebeest.org/blog/mjw/2016/01/09/looking-forward-to-gcc6-nice-new-warnings/> about new dubious-looking constructs that the GCC 6 C and C++ compilers can pick up. I particularly like the latter, which warns against a situation like the following: if (cond) statement_guarded_by_cond; statement_not_guarded_by_cond; /* though it may look like it is */ Of course, this only works in a language that allows the redundancy of having both bracketing symbols and indentation. This is why trying to get rid of one, and having the other do duty for both--is such a bad idea.