Re: prewarm compiler warnings

On 2018-Nov-23, Erik Rijkers wrote:

> gcc-6.3.0 complains about this:
> 
> autoprewarm.c: In function ‘autoprewarm_main’:
> autoprewarm.c:210:9: warning: variable ‘rc’ set but not used
> [-Wunused-but-set-variable]
>    int   rc;
> 
> The warning comes only in master.

Yeah, it's fairly new.  I noticed a couple of other places that could
use the same adjustment and pushed them all together.  (I used a cast to
void as all other places do that, which appeases Coverity about the
discrepancy.)

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services