Suppress new "may be used uninitialized" warning.

Buildfarm member mamba fails to deduce that the function never uses this
variable without initializing it.  Back-patch to v12, like commit
b412f402d1e020c5dac94f3bf4a005db69519b99.

diff --git a/src/backend/catalog/index.c b/src/backend/catalog/index.c
index 24d6356c3d1663d49e7d9c77faa22022520e49ee..6e4891eb75b15976a181642be286ddcf021dcff8 100644 (file)
--- a/src/backend/catalog/index.c
+++ b/src/backend/catalog/index.c
@@ -2788,8 +2788,8 @@ index_update_stats(Relation rel,
                                   double reltuples)
 {
        bool            update_stats;
-       BlockNumber relpages;
-       BlockNumber relallvisible;
+       BlockNumber relpages = 0;       /* keep compiler quiet */
+       BlockNumber relallvisible = 0;
        Oid                     relid = RelationGetRelid(rel);
        Relation        pg_class;
        ScanKeyData key[1];
@@ -2826,8 +2826,6 @@ index_update_stats(Relation rel,
 
                if (rel->rd_rel->relkind != RELKIND_INDEX)
                        visibilitymap_count(rel, &relallvisible, NULL);
-               else                                    /* don't bother for indexes */
-                       relallvisible = 0;
        }
 
        /*