Fix compiler warning in rangetypes_spgist.c.

On gcc 7.2.0, comparing pointer to (Datum) 0 produces a warning.
Treat it as a simple pointer to avoid that; this is more consistent
with comparable code elsewhere, anyway.

Tomas Vondra

Discussion: https://postgr.es/m/99410021-61ef-9a9a-9bc8-f733ece637ee@2ndquadrant.com

diff --git a/src/backend/utils/adt/rangetypes_spgist.c b/src/backend/utils/adt/rangetypes_spgist.c
index d934105d322d1a3342d1277ad15c83a572df13f9..27fbf6643396b37164160e2f2b1c2840f54b161d 100644 (file)
--- a/src/backend/utils/adt/rangetypes_spgist.c
+++ b/src/backend/utils/adt/rangetypes_spgist.c
@@ -556,7 +556,7 @@ spg_range_quad_inner_consistent(PG_FUNCTION_ARGS)
                                         * for lower or upper bounds to be adjacent. Deserialize
                                         * previous centroid range if present for checking this.
                                         */
-                                       if (in->traversalValue != (Datum) 0)
+                                       if (in->traversalValue)
                                        {
                                                prevCentroid = DatumGetRangeTypeP(in->traversalValue);
                                                range_deserialize(typcache, prevCentroid,