Fix build problems

Author: knizhnik

contrib/postgres_fdw/postgres_fdw.c

@@ -3951,7 +3951,7 @@ postgres_fdw_exec(PG_FUNCTION_ARGS)
 	ForeignTable *table = GetForeignTable(relid);
 	ForeignServer *server = GetForeignServer(table->serverid);
 	UserMapping *user = GetUserMapping(userid, server->serverid);
-	PGconn	   *conn = GetConnection(server, user, false);
+	PGconn	   *conn = GetConnection(user, false);
 	PGresult   *res = PQexec(conn, sql);
 
 	PQclear(res);

contrib/postgres_fdw/postgres_fdw.h

@@ -150,4 +150,6 @@ extern bool is_builtin(Oid objectId);
 extern bool is_shippable(Oid objectId, Oid classId, PgFdwRelationInfo *fpinfo);
 extern const char *get_jointype_name(JoinType jointype);
 
+extern bool UseTsDtmTransactions;
+
 #endif   /* POSTGRES_FDW_H */