Prevent possible compiler warnings.

Simon Riggs reports that rnode.dbNode and rnode.spcNode were
generating unused variable warnings on gcc 4.4.3 with CFLAGS=-O1

diff --git a/src/backend/utils/adt/dbsize.c b/src/backend/utils/adt/dbsize.c
index f4729a7b6b330b5ad98c42764f96e6f7f17d6208..543a244bf999ce09794c36438ec70c5238550adc 100644 (file)
--- a/src/backend/utils/adt/dbsize.c
+++ b/src/backend/utils/adt/dbsize.c
@@ -603,6 +603,9 @@ pg_relation_filepath(PG_FUNCTION_ARGS)
                default:
                        /* no storage, return NULL */
                        rnode.relNode = InvalidOid;
+                       /* some compilers generate warnings without these next two lines */
+                       rnode.dbNode = InvalidOid;
+                       rnode.spcNode = InvalidOid;
                        break;
        }