Attempt to fix compiler warning on old compiler

Build farm member lapwing (using gcc 4.7.2) didn't like one part of
9fd45870c1436b477264c0c82eb195df52bc0919, raising a compiler warning.
Revert that for now.

diff --git a/src/backend/optimizer/path/costsize.c b/src/backend/optimizer/path/costsize.c
index 190302b9bde8ccdaa642e869fe4abf30e0e89865..5e5732f6e1207e96489777d19b4d08d36e557961 100644 (file)
--- a/src/backend/optimizer/path/costsize.c
+++ b/src/backend/optimizer/path/costsize.c
@@ -2926,12 +2926,13 @@ cost_agg(Path *path, PlannerInfo *root,
        double          output_tuples;
        Cost            startup_cost;
        Cost            total_cost;
-       const AggClauseCosts dummy_aggcosts = {0};
+       AggClauseCosts dummy_aggcosts;
 
        /* Use all-zero per-aggregate costs if NULL is passed */
        if (aggcosts == NULL)
        {
                Assert(aggstrategy == AGG_HASHED);
+               MemSet(&dummy_aggcosts, 0, sizeof(AggClauseCosts));
                aggcosts = &dummy_aggcosts;
        }