Fix compiler warning.

Mithun Cy, per a report by Erik Rijkers

diff --git a/src/backend/access/hash/hashpage.c b/src/backend/access/hash/hashpage.c
index d52f149389b3c1e666c64477b39c3dc71b7d22a2..9485978bfb09d1a88192739ae3e4be4da60e6fe0 100644 (file)
--- a/src/backend/access/hash/hashpage.c
+++ b/src/backend/access/hash/hashpage.c
@@ -1220,7 +1220,7 @@ _hash_getcachedmetap(Relation rel, Buffer *metabuf, bool force_refresh)
        Assert(metabuf);
        if (force_refresh || rel->rd_amcache == NULL)
        {
-               char   *cache;
+               char   *cache = NULL;
 
                /*
                 * It's important that we don't set rd_amcache to an invalid