Error when chunk is not found during chunk tuple routing

Fix potential null pointer deference found by coverity.
This is a false positive as pre checks for chunk tuple routing
ensure either the hypertable lookup or chunk succeed. Nevertheless
it's still useful to be explicit in the function call looking up
the chunk.

Author: svenklemm

src/chunk_tuple_routing.c

@@ -45,7 +45,7 @@ ts_chunk_tuple_routing_create(EState *estate, ResultRelInfo *rri)
 	 */
 	if (!ctr->hypertable)
 	{
-		Chunk *chunk = ts_chunk_get_by_relid(RelationGetRelid(rri->ri_RelationDesc), false);
+		Chunk *chunk = ts_chunk_get_by_relid(RelationGetRelid(rri->ri_RelationDesc), true);
 		ctr->hypertable = ts_hypertable_cache_get_entry(ctr->hypertable_cache,
 														chunk->hypertable_relid,
 														CACHE_FLAG_NONE);