Update for Postgres 16 compatibility (#4)

* Update for Postgres 16 compatibility

* Update mod_pgsql.c

Author: frytimo

src/mod/databases/mod_pgsql/mod_pgsql.c

@@ -605,6 +605,10 @@ switch_status_t database_handle_exec_string(switch_database_interface_handle_t *
 #if PG_VERSION_NUM >= 90002
 		case PGRES_SINGLE_TUPLE:
 			/* Added in PostgreSQL 9.2 */
+#endif
+#if PG_VERSION_NUM >= 160001
+                case PGRES_TUPLES_CHUNK:
+			/* Added in PostgreSQL 16 */
 #endif
 		case PGRES_COMMAND_OK:
 		case PGRES_TUPLES_OK: