Fix another (related to CORE-1246 and CORE-2339) issue with derived e…

…xpressions, reported by Dmitry:

select
 *
from
(select
  coalesce(sum(r1.RDB$RELATION_ID), 0) as RDB$RELATION_ID
from
  (select *
  from
  rdb$database ) r1 ) r2

wrongly returns NULL

src/dsql/pass1.cpp

@@ -10113,7 +10113,13 @@ static void remap_streams_to_parent_context( dsql_nod* input, dsql_ctx* parent_c
 		break;
 
 	case nod_derived_table:
-		// nothing to do here.
+		{
+			dsql_nod* list = input->nod_arg[e_derived_table_rse]->nod_arg[e_rse_streams];
+		    dsql_nod** ptr = list->nod_arg;
+
+			for (const dsql_nod* const* const end = ptr + list->nod_count; ptr < end; ptr++)
+				remap_streams_to_parent_context(*ptr, parent_context);
+		}
 		break;
 
 	default: