Fixing spurious "statement is not reachable" in template code

[tsbockman]

On Saturday, 24 October 2015 at 17:25:23 UTC, tsbockman wrote:
> While improving the DMD front-end's constant folding:
>     https://github.com/D-Programming-Language/dmd/pull/5229
> I found out about DMD issue 14835:
>     https://issues.dlang.org/show_bug.cgi?id=14835

Walter has proposed a simple fix for this issue. It seems like a 
good idea to me:
     https://github.com/dlang/dmd/pull/12311
But, I thought it would be good to get more eyes on this since we 
all found it to be such a difficult problem in the past.

What does everyone else think?