Add start of allowing date time output to be suppressed when 0

layout/date_time.c

@@ -43,9 +43,16 @@ static bool json_field_date_time_reader( struct json_pull_parser* jpp, void* fie
 static bool json_field_date_time_writer( struct json_writer* jw, const char* field_name, void* field_data, struct json_object_field* layout_field_data )
 {
 	FILE* f = jw->f;
+	time_t time = *(time_t*)field_data;
+
+	/*
+	if( !layout_field_data->required && time == 0 ) {
+		return false;
+	}
+	*/
 
 	json_write_field_name( jw, field_name );
-	json_write_date_time_string( *(time_t*)field_data, jw->f );
+	json_write_date_time_string( time, jw->f );
 	return true;
 }
 struct json_field_type json_field_date_time = {