re: toolchain/57723: -Wmisleading-indentation can warn incorrectly

[matthew green <mrg%eterna23.net@localhost>]

netbsd-9 shipped with GCC 7, which is EOL from upstream's
POV, so there's unlikely to be any work done there.

if it occurs with GCC 12 there might be a reason to file an
upstream PR, but maybe it's already fixed.  the indent 
checker in GCC 7 was pretty early and had some issues..


.mrg.