Suppress -Wunused-result warning for strtol().

I'm not sure which bozo thought it's a problem to use strtol() only
for its endptr result, but silence the warning using same method
used elsewhere.

Report: <f845d3a6-5328-3e2a-924f-f8e91aa2b6d2@2ndquadrant.com>

diff --git a/src/backend/utils/adt/dbsize.c b/src/backend/utils/adt/dbsize.c
index 0e8a82d6f4dd5ee4bf1110ee00723a5043239f78..3167bad92b0d42ae52d9338009e0dcd7fc063fa1 100644 (file)
--- a/src/backend/utils/adt/dbsize.c
+++ b/src/backend/utils/adt/dbsize.c
@@ -759,13 +759,15 @@ pg_size_bytes(PG_FUNCTION_ARGS)
        /* Part (4): optional exponent */
        if (*endptr == 'e' || *endptr == 'E')
        {
+               long            exponent;
                char       *cp;
 
                /*
                 * Note we might one day support EB units, so if what follows 'E'
                 * isn't a number, just treat it all as a unit to be parsed.
                 */
-               (void) strtol(endptr + 1, &cp, 10);
+               exponent = strtol(endptr + 1, &cp, 10);
+               (void) exponent;                /* Silence -Wunused-result warnings */
                if (cp > endptr + 1)
                        endptr = cp;
        }