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 bc01a3e93c5eb53e2b7763ba2e0cd220b70bcc14..f9bb721c5fe27aab677052bf2e7c62476cdd7b29 100644 (file)
--- a/src/backend/catalog/index.c
+++ b/src/backend/catalog/index.c
@@ -2807,8 +2807,8 @@ 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];
@@ -2849,8 +2849,6 @@ 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;
    }
 
    /*